# Service bulletin LI82 20\-P\-067107 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10158321 - Published by NHTSA: 2019\-04\-15 - Manufacturer's number: LI82 20\-P\-067107 - Manufacturer's date: 2017\-10\-05 - NHTSA component: EXTERIOR LIGHTING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT ## NHTSA's summary LED light on thermal cup holder in rear passenger compartment of BR 222 flickers ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10158321-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10158321-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Equipment and accessories, Lighting ## Vehicles listed - 2018 MERCEDES BENZ A 220 - 2018 MERCEDES BENZ C 300 4MATIC - 2018 MERCEDES BENZ C205 - 2018 MERCEDES BENZ S217 - 2018 MERCEDES BENZ S222 - 2018 MERCEDES\-BENZ AMG C43 - 2018 MERCEDES\-BENZ AMG C63 - 2018 MERCEDES\-BENZ AMG C63S - 2018 MERCEDES\-BENZ AMG CLA45 - 2018 MERCEDES\-BENZ AMG E63S - 2018 MERCEDES\-BENZ AMG GLA45 - 2018 MERCEDES\-BENZ AMG GLC43 - 2018 MERCEDES\-BENZ AMG GLC63 - 2018 MERCEDES\-BENZ AMG GLC63S - 2018 MERCEDES\-BENZ AMG GLE43 - 2018 MERCEDES\-BENZ AMG GLE63 - 2018 MERCEDES\-BENZ AMG GLE63S - 2018 MERCEDES\-BENZ AMG GLS63 - 2018 MERCEDES\-BENZ AMG GT - 2018 MERCEDES\-BENZ AMG GT C - 2018 MERCEDES\-BENZ AMG GT R - 2018 MERCEDES\-BENZ AMG GT ROADSTER - 2018 MERCEDES\-BENZ AMG GT S - 2018 MERCEDES\-BENZ AMG S63 - 2018 MERCEDES\-BENZ AMG S65 - 2018 MERCEDES\-BENZ C 250 D - 2018 MERCEDES\-BENZ C 300 - 2018 MERCEDES\-BENZ C 350 E - 2018 MERCEDES\-BENZ CLA 250 - 2018 MERCEDES\-BENZ E 300 - 2018 MERCEDES\-BENZ E 400 - 2018 MERCEDES\-BENZ E213 - 2018 MERCEDES\-BENZ E238 - 2018 MERCEDES\-BENZ E43 AMG - 2018 MERCEDES\-BENZ GLA 250 - 2018 MERCEDES\-BENZ GLC - 2018 MERCEDES\-BENZ GLC 300 - 2018 MERCEDES\-BENZ GLC 350 E - 2018 MERCEDES\-BENZ GLE - 2018 MERCEDES\-BENZ GLE 350 - 2018 MERCEDES\-BENZ GLE 550 E - 2018 MERCEDES\-BENZ GLS 450 - 2018 MERCEDES\-BENZ GLS 550 - 2018 MERCEDES\-BENZ METRIS - 2018 MERCEDES\-BENZ S 450 - 2018 MERCEDES\-BENZ S 550 - 2018 MERCEDES\-BENZ S560 - 2018 MERCEDES\-BENZ S63 - 2018 MERCEDES\-BENZ SLC 300 - 2018 MERCEDES\-BENZ SPRINTER 2500 - 2018 MERCEDES\-BENZ SPRINTER 3500 - 2018 MERCEDES\-MAYBACH S 560 4MATIC - 2018 MERCEDES\-MAYBACH S 650 ## Recalls for the same vehicles and component - [20V156000](/recalls/nhtsa/20V156000.md), 2020-03-18: EQUIPMENT:OTHER:LABELS - [20V155000](/recalls/nhtsa/20V155000.md), 2020-03-18: EQUIPMENT:OTHER:LABELS ## Other bulletins for the same vehicles and component - [LI82.10\-P\-078301](/bulletins/11031580.md), 2026-04-27, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). 2. Connect battery backup via a charger. 3. Open the front\-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. \(see Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Note: Only implement Remedy 1 for model series 463 \(from model year 2018\) and model series 465. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10\-P\-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. • Open ventilation system LI82.10\-P\-078302 • Closed ventilation system LI82.10\-P\-078304 - [LI82.10\-P\-078301](/bulletins/11029959.md), 2026-03-11, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). 2. Connect battery backup via a charger. 3. Open the front\-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. \(see Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Note: Only implement Remedy 1 for model series 463 \(from model year 2018\) and model series 465. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10\-P\-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. • Open ventilation system LI82.10\-P\-078302 • Closed ventilation system LI82.10\-P\-078304 - [LI82.10\-P\-078301](/bulletins/11029025.md), 2026-02-25, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). 2. Connect battery backup via a charger. 3. Open the front\-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. \(see Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10\-P\-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. • Open ventilation system LI82.10\-P\-078302 • Closed ventilation system LI82.10\-P\-078304 - [LI82.10\-P\-078896](/bulletins/11017500.md), 2025-05-02, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. A leak test must be performed to determine if physical fogging exists or if the headlamp is leaky. Remedy Check for external damage: You can identify a damaged headlamp in the following way: For headlamps with a closed system 1. Check the headlamps for any external damage and check also for correct seating of the Gore\-diaphragm/correct latching of the cover caps. 2. If the headlamp exhibits any external damage, replace the headlamp. For headlamps with an open system 1. Check the headlamps for any external damage and seal off the vent, then make sure the cover caps are latched correctly into place. 2. If the headlamp exhibits any external damage, replace the headlamp. Note: External damage to the headlamp does not present a warranty or goodwill case. 1. Clear fogged/condensed LED headlamps and LED rear lamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). 7. If the condensation has disappeared, nothing else has to be done. Note: If defrosting has been performed, you can skip the first step. 2. Leak test of headlamp with overpressure: • Connect test adapter to pressure tester. \(Figure 1\) • Check test adapter for leak tightness. To do so, connect plug and coupling \(picture 2\) and apply a maximum overpressure of 30 mbar. The pressure must remain constant. If the pressure does not remain constant, use a new adapter. • All vents have to be sealed with sealing compound and the existing diaphragm with the stamp \(picture 3 \[3\]\). \(Picture 4\) Make allowance for the different headlamp variants here \(there are different outlet openings\). • Check if the headlamp needs to be removed to gain access to the diagnostic socket on the headlamp housing. • Plug the adapter onto the diagnostic socket on the headlamp housing. \(Picture 5\). • Apply a maximum of 30 mbar overpressure to the headlamp housing. Note: If the maximum overpressure of 50 mbar is exceeded the headlamp seal will be damaged \(picture 6\). • If a pressure drop of less than 10 mbar is measured within 30 seconds, the headlamp is tight and there is natural physical condensation. • If a higher pressure drop than 10 mbar is measured within 30 seconds, the headlamp is leaky. Note: The leaky position can be localized with the aid of soap suds. If the pressure test is not passed, the headlamp is leaky. If the cause cannot be rectified, the headlamp must be replaced. Note: If the headlamp is replaced, no dry packs may be installed on the new replacement headlamp. AR82.10\-P\-5455WT was created for the pressure test. This AR can be used as a reference manual for all closed headlamps. In the event of an open headlamp system, the vent ducts must be sealed before the pressure test. - [LI82.10\-P\-078301](/bulletins/11017496.md), 2025-05-02, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Remedy NOTE: If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps and LED rear lamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in the formation of condensation, check the headlamp for damage. \(See Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A damaged headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness in accordance with LI82.10\-P\-078896 The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. - [LI82.10\-P\-078069](/bulletins/11010494.md), 2024-11-13, Service bulletin: EXTERIOR LIGHTING; VISIBILITY/WIPER. Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. Remedy Rear lamp: Remedy 1: Clearing fogged/condensed rear lamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4 °F\) Note: Do not wash the vehicle or subject it to high\-pressure cleaning before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the trunk. 4. Switch on the exterior lighting. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation \-\> a significant reduction in the formation of condensation must be clearly recognizable \(defogging progress\). Note: \-If no reduction in the degree of fogging is visible, the rear lamp is defective and must be replaced. \-It is not physically possible to defog the headlamps completely – some residual fogging may remain. Fogging does not impair the functionality or the service life of the rear lamps. \-Simultaneous fogging of multiple component parts indicates extreme climatic conditions and also does not impair the functionality or the service life of the rear lamps. Remedy 2: You can recognize a defective rear lamp as follows: 1. Check the rear lamps to ensure that no external damage is present, and that the differential aeration cells and the diaphragm are present and correctly seated. \-\> If there are signs of external damage on the rear lamp, the component parts must be replaced as per WIS instructions. 2. Check the electrical connectors of the plugs and pins. \-\> If moisture/corrosion/etc. is present, the component part must be replaced as per WIS instructions. 3. Check for leak tightness \-\> Close all openings with Terostat IX or similar and establish and stabilize via an overpressure \(40–50 mbar\) via the plug. \-\> In the event of a sudden pressure drop, the component part must be replaced as per WIS instructions. Note: External damage to the rear lamps does not constitute a warranty or goodwill case. - [LI82.10\-P\-078307](/bulletins/11007974.md), 2024-09-24, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. A leak test must be performed to determine if physical fogging exists or if the headlamp is leaky. Remedy In advance, observe LI82.10\-P\-078301 "Headlamps or Front Fog Lamps Leaking or Fogged". 1. Prepare headlamp/check for external damage: For headlamps with a closed system 1. Check the headlamps for any external damage and check also for correct seating of the Gore\-diaphragm/correct latching of the cover caps. 2. If the headlamp exhibits any external damage, replace the headlamp. For headlamps with an open system 1. Check the headlamps for any external damage and seal off the vent then make sure the cover caps are latched correctly into place. 2. If the headlamp exhibits any external damage, replace the headlamp. Note: A headlamp with external damage is not a warranty or goodwill case. 2. Leak test of headlamp with overpressure: • Connect test adapter to pressure tester. \(Figure 1\) • Check test adapter for leak tightness. To do so, connect plug and coupling \(picture 2\) and apply a maximum overpressure of 30 mbar. The pressure must remain constant. If the pressure does not remain constant, use a new adapter. • Seal all the outlet openings using sealing compound and the given diaphragm with the plunger \(picture 3\). \(Picture 4\) Make allowance for the different headlamp variants here \(there are different outlet openings\). • Check if the headlamp needs to be removed to gain access to the diagnostic socket on the headlamp housing. • Plug the adapter onto the diagnostic socket on the headlamp housing. \(Picture 5\). • Apply a maximum of 30 mbar overpressure to the headlamp housing. Note: If the maximum overpressure of 50 mbar is exceeded the headlamp seal will be damaged. • If a pressure drop of less than 10 mbar is measured within 30 seconds, the headlamp is not leaky and the problem is down to natural physical fogging. • If a pressure drop of more than 10 mbar is measured within 30 seconds, the headlamp is leaky. Note: The leaky position can be localized with the aid of soap suds. Replace any leaky headlamps. Note: Desiccant packs can be installed for headlamps that are not leaky. See: • LI82.10\-P\-064766 Fogged headlamp, desiccant pack installed \- open ventilation system • LI82.10\-P\-078304 Fogged headlamp, desiccant pack installed \- closed ventilation system - [LI82.10\-P\-078301](/bulletins/11007753.md), 2024-09-13, Service bulletin: EXTERIOR LIGHTING. Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Headlamps comply with all applicable standards. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps and LED rear lamps: 1. Drive vehicle into workshop \(temperature higher than \+18 °C/\+64.4 °F\) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4°F\). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable \(thawing progress\). Note: If there is no visible reduction in the formation of condensation, check the headlamp for a defect. \(See Remedy 2\) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A Damaged headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness in accordance with LI82.10\-P\-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. Open ventilation system: LI82.10\-P\-064766. Closed ventilation system LI82.10\-P\-078304 - [LI82.10\-P\-078069](/bulletins/11005294.md), 2024-07-27, Service bulletin: EXTERIOR LIGHTING. Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. Remedy Rear lamp: Remedy 1: Clearing fogged/condensed rear lamps: 1. Drive the vehicle into the workshop \(temperature higher than \+18 °C/\+64.4 °F\) Note: Do not wash the vehicle or subject it to high\-pressure cleaning before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the trunk. 4. Switch on the exterior lighting. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation \-\> a significant reduction in the formation of condensation must be clearly recognizable \(defogging progress\). - [LI82.85\-P\-076799](/bulletins/10241790.md), 2023-09-05, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. The Mercedes me connect services cannot be activated. The remote status data does not update. Error in N112/9 \- control unit for telematics services \(HERMES\). In the HERMES control unit log, under the "URL" tab, the value DEFAULT is stored for "atpServerUrl" and/or "rcsServerUrl". Please carry out a re\-commissioning of the control unit N112/9 \- Control unit for telematics services \(HERMES\), which includes both a software update as well as coding. The fault will be rectified by the newly included coding. As a result of the software update to the current software of the control unit N112/9 \- Control unit for telematics services \(HERMES\), this fault will no longer occur in future. 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