# Service bulletin LI83.30\-P\-079850

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: 11027566
- Published by NHTSA: 2026\-01\-09
- Manufacturer's number: LI83.30\-P\-079850
- Manufacturer's date: 2026\-01\-07
- NHTSA component: VISIBILITY/WIPER

## NHTSA's summary

Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy AC Diagnosis \(General\) Initial Steps Verify Customer Concern • Confirm the issue reported by the customer. Compare to Like Vehicle • Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players • Identify the diagnostic strategy and involved components/systems. Testing • Perform relevant diagnostic tests. Refrigerant Quantity • Record the amount of refrigerant recovered and compare it to the specified value \(if applicable\). • Forming Gas is the ONLY approved leak test method. \(DYE is NOT approved\) TIPS Case Submission Requirements Cooling Capacity Test \(If System Has a Charge\) Before Repairs Gauge Readings • High and Low pressure readings \(from machine or separate gauges\). Leak Detection \(if applicable\) • PPM of any leaks found. XENTRY Printouts • Climate control AVs. • HV compressor AVs \(for heat and AC systems\). Thermometer Readings • Left and right dash vents. • Center vent, footwell, and/or rear vents \(if concern is localized\). Ambient Conditions • Temperature and humidity from OCP AVs \(if available\). After Repairs \- Warranty Submission Requirements on the Repair Order Gauge Readings • High and Low pressure readings before and after repairs. Thermometer Readings • Left and right dash vents before and after. • Center vent, footwell, and/or rear vents before and after \(if localized concern\). Documentation • Complaint Analysis, Game/Players, and Testing Steps. • Include expected results and technical justification for the diagnosis. • Avoid listing R/I steps—focus on diagnostic reasoning and root cause. • All prior measurements need to be documented on the repair order. OP code usage: 831232 \- Max .5 for Cooling Capacity Test 831040 \- Only to be utilized if you have a fault code and are actively diagnosing that fault code 831762 \- This includes basic leak check 831285 \- This can only be used in extenuating circumstances where a leak cannot be found

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027566-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027566-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Glass, wipers and mirrors, Wipers and washers

## Vehicles listed

- 2018 MERCEDES BENZ C 300 4MATIC
- 2003 to 2008 MERCEDES BENZ E500
- 2009 MERCEDES BENZ G550
- 2019 to 2022 MERCEDES\-BENZ A 220
- 2020 to 2021 MERCEDES\-BENZ A 220 4MATIC
- 2020 to 2021 MERCEDES\-BENZ AMG A35
- 2020 MERCEDES\-BENZ AMG A35 4MATIC
- 2023 to 2024 MERCEDES\-BENZ AMG C43
- 2023 to 2026 MERCEDES\-BENZ AMG C43 4MATIC
- 2015 to 2019 MERCEDES\-BENZ AMG C63
- 2019 MERCEDES\-BENZ AMG C63 S
- 2024 MERCEDES\-BENZ AMG C63 S E
- 2015 to 2018 MERCEDES\-BENZ AMG C63S
- 2020 to 2024 MERCEDES\-BENZ AMG CLA35
- 2020 MERCEDES\-BENZ AMG CLA35 4MATIC
- 2026 MERCEDES\-BENZ AMG CLA35 4MATIC
- 2014 to 2019 MERCEDES\-BENZ AMG CLA45
- 2026 MERCEDES\-BENZ AMG CLA45S 4MATIC\+
- 2024 MERCEDES\-BENZ AMG CLE53
- 2026 MERCEDES\-BENZ AMG CLE53 4MATIC CABRIOLET
- 2026 MERCEDES\-BENZ AMG CLE53 4MATIC COUPE
- 2024 to 2025 MERCEDES\-BENZ AMG CLE53 4MATIC\+
- 2025 MERCEDES\-BENZ AMG CLE53 4MATIC\+ CABRIOLET
- 2019 to 2021 MERCEDES\-BENZ AMG CLS53
- 2017 to 2018 MERCEDES\-BENZ AMG E43
- 2019 to 2023 MERCEDES\-BENZ AMG E53
- 2023 MERCEDES\-BENZ AMG E53E
- 2023 MERCEDES\-BENZ AMG E63 S
- 2023 to 2025 MERCEDES\-BENZ AMG EQE
- 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC
- 2022 to 2024 MERCEDES\-BENZ AMG EQS
- 2003 to 2009 MERCEDES\-BENZ AMG G 55
- 2013 to 2024 MERCEDES\-BENZ AMG G63
- 2016 to 2018 MERCEDES\-BENZ AMG G65
- 2024 to 2025 MERCEDES\-BENZ AMG GLA 35
- 2024 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2026 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2021 to 2023 MERCEDES\-BENZ AMG GLA35
- 2020 to 2023 MERCEDES\-BENZ AMG GLA45
- 2020 to 2025 MERCEDES\-BENZ AMG GLB35
- 2026 MERCEDES\-BENZ AMG GLB35 4MATIC
- 2024 MERCEDES\-BENZ AMG GLC43
- 2024 to 2026 MERCEDES\-BENZ AMG GLC43 4MATIC
- 2024 to 2025 MERCEDES\-BENZ AMG GLC43 4MATIC COUPE
- 2024 to 2025 MERCEDES\-BENZ AMG GLC63 S E
- 2016 to 2019 MERCEDES\-BENZ AMG GLE43
- 2021 to 2022 MERCEDES\-BENZ AMG GLE53
- 2023 to 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+
- 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ COUPE
- 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S
- 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+
- 2025 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ COUPE
- 2018 MERCEDES\-BENZ AMG GLE63S
- 2020 to 2022 MERCEDES\-BENZ AMG GLS63
- 2026 MERCEDES\-BENZ AMG GLS63
- 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+
- 2023 MERCEDES\-BENZ AMG GLS63E
- 2017 to 2021 MERCEDES\-BENZ AMG GT
- 2023 MERCEDES\-BENZ AMG GT 63 S E COUPE
- 2018 to 2021 MERCEDES\-BENZ AMG GT C
- 2018 to 2020 MERCEDES\-BENZ AMG GT R
- 2016 to 2020 MERCEDES\-BENZ AMG GT S
- 2020 to 2026 MERCEDES\-BENZ AMG GT43
- 2019 to 2023 MERCEDES\-BENZ AMG GT53
- 2024 to 2025 MERCEDES\-BENZ AMG GT55
- 2019 to 2026 MERCEDES\-BENZ AMG GT63
- 2022 to 2023 MERCEDES\-BENZ AMG GT63 S
- 2024 to 2025 MERCEDES\-BENZ AMG GT63 S E
- 2026 MERCEDES\-BENZ AMG GT63 S E PERFORMANCE 4MATIC\+
- 2019 to 2021 MERCEDES\-BENZ AMG GT63S
- 2023 to 2025 MERCEDES\-BENZ AMG S 63 E 4MATIC\+
- 2014 to 2019 MERCEDES\-BENZ AMG S63
- 2015 to 2017 MERCEDES\-BENZ AMG S65
- 2023 to 2026 MERCEDES\-BENZ AMG SL43
- 2022 to 2025 MERCEDES\-BENZ AMG SL55
- 2022 to 2023 MERCEDES\-BENZ AMG SL63
- 2025 MERCEDES\-BENZ AMG SL63
- 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E
- 2011 to 2012 MERCEDES\-BENZ AMG SLS
- 2017 to 2026 MERCEDES\-BENZ C 300
- 2021 to 2026 MERCEDES\-BENZ C 300 4MATIC
- 2018 MERCEDES\-BENZ C 350 E
- 2015 to 2016 MERCEDES\-BENZ C300
- 2016 to 2017 MERCEDES\-BENZ C350E
- 2015 MERCEDES\-BENZ C400
- 2018 to 2026 MERCEDES\-BENZ CLA 250
- 2020 to 2021 MERCEDES\-BENZ CLA 250 4MATIC
- 2026 MERCEDES\-BENZ CLA 250 4MATIC
- 2026 MERCEDES\-BENZ CLA 250\+ \(EV\)
- 2026 MERCEDES\-BENZ CLA 350 4MATIC \(EV\)
- 2014 to 2017 MERCEDES\-BENZ CLA250
- 2024 MERCEDES\-BENZ CLE 300
- 2024 to 2025 MERCEDES\-BENZ CLE 300 4MATIC
- 2024 to 2026 MERCEDES\-BENZ CLE 300 4MATIC CABRIOLET
- 2026 MERCEDES\-BENZ CLE 300 4MATIC COUPE
- 2024 MERCEDES\-BENZ CLE 450
- 2024 to 2025 MERCEDES\-BENZ CLE 450 4MATIC
- 2024 to 2026 MERCEDES\-BENZ CLE 450 4MATIC CABRIOLET
- 2026 MERCEDES\-BENZ CLE 450 4MATIC COUPE
- 2019 to 2023 MERCEDES\-BENZ CLS 450
- 2018 to 2019 MERCEDES\-BENZ E 300
- 2020 to 2023 MERCEDES\-BENZ E 350
- 2024 to 2026 MERCEDES\-BENZ E 350 4MATIC
- 2018 MERCEDES\-BENZ E 400
- 2019 to 2023 MERCEDES\-BENZ E 450
- 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC
- 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC ALL\-TERRAIN
- 2017 MERCEDES\-BENZ E300
- 2017 MERCEDES\-BENZ E400
- 2025 MERCEDES\-BENZ E53 E 4MATIC\+
- 2023 to 2025 MERCEDES\-BENZ EQB 250\+
- 2022 to 2025 MERCEDES\-BENZ EQB 300 4MATIC
- 2022 to 2025 MERCEDES\-BENZ EQB 350 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQE 350 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQE 350\+
- 2023 to 2025 MERCEDES\-BENZ EQE 500 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQE SUV 350 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQE SUV 350\+
- 2023 to 2025 MERCEDES\-BENZ EQE SUV 500 4MATIC
- 2022 MERCEDES\-BENZ EQS 450
- 2023 to 2025 MERCEDES\-BENZ EQS 450 4MATIC
- 2022 to 2025 MERCEDES\-BENZ EQS 450\+
- 2022 to 2024 MERCEDES\-BENZ EQS 580
- 2022 to 2025 MERCEDES\-BENZ EQS 580 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQS SUV 450 4MATIC
- 2023 to 2025 MERCEDES\-BENZ EQS SUV 450\+
- 2023 to 2025 MERCEDES\-BENZ EQS SUV 580 4MATIC
- 2019 MERCEDES\-BENZ G 550
- 2025 MERCEDES\-BENZ G 550
- 2025 MERCEDES\-BENZ G 580 EV
- 2016 to 2018 MERCEDES\-BENZ G550
- 2020 to 2026 MERCEDES\-BENZ GLA 250
- 2021 MERCEDES\-BENZ GLA 250 4MATIC
- 2024 MERCEDES\-BENZ GLA 250 4MATIC
- 2026 MERCEDES\-BENZ GLA 250 4MATIC
- 2020 to 2026 MERCEDES\-BENZ GLB 250
- 2020 to 2021 MERCEDES\-BENZ GLB 250 4MATIC
- 2026 MERCEDES\-BENZ GLB 250 4MATIC
- 2020 to 2026 MERCEDES\-BENZ GLC 300
- 2023 to 2026 MERCEDES\-BENZ GLC 300 4MATIC
- 2024 to 2026 MERCEDES\-BENZ GLC 300 4MATIC COUPE
- 2024 MERCEDES\-BENZ GLC 300 COUPE
- 2025 to 2026 MERCEDES\-BENZ GLC 350 E 4MATIC
- 2026 MERCEDES\-BENZ GLC43 4MATIC COUPE
- 2020 to 2024 MERCEDES\-BENZ GLE 350
- 2024 to 2026 MERCEDES\-BENZ GLE 350 4MATIC
- 2020 to 2024 MERCEDES\-BENZ GLE 450
- 2025 to 2026 MERCEDES\-BENZ GLE 450 4MATIC
- 2025 MERCEDES\-BENZ GLE 450 4MATIC COUPE
- 2020 to 2021 MERCEDES\-BENZ GLE 580
- 2022 to 2024 MERCEDES\-BENZ GLE 580 4MATIC
- 2016 to 2017 MERCEDES\-BENZ GLE450
- 2016 to 2017 MERCEDES\-BENZ GLE63S
- 2020 MERCEDES\-BENZ GLS 450
- 2022 to 2025 MERCEDES\-BENZ GLS 450 4MATIC
- 2020 MERCEDES\-BENZ GLS 580 4MATIC
- 2022 to 2025 MERCEDES\-BENZ GLS 580 4MATIC
- 2023 MERCEDES\-BENZ GLS 600
- 2021 MERCEDES\-BENZ GLS450
- 2021 MERCEDES\-BENZ GLS580
- 2018 to 2020 MERCEDES\-BENZ S 450
- 2021 MERCEDES\-BENZ S 500
- 2023 MERCEDES\-BENZ S 500
- 2022 to 2025 MERCEDES\-BENZ S 500 4MATIC
- 2019 to 2020 MERCEDES\-BENZ S 560 E
- 2021 MERCEDES\-BENZ S 580
- 2023 MERCEDES\-BENZ S 580
- 2022 to 2025 MERCEDES\-BENZ S 580 4MATIC
- 2023 MERCEDES\-BENZ S 580 E
- 2023 to 2025 MERCEDES\-BENZ S 580 E 4MATIC
- 2014 to 2017 MERCEDES\-BENZ S550
- 2016 to 2017 MERCEDES\-BENZ S550 4MATIC
- 2016 MERCEDES\-BENZ S550 HYBRID
- 2015 MERCEDES\-BENZ S550E
- 2017 MERCEDES\-BENZ S550E
- 2015 to 2017 MERCEDES\-BENZ S600
- 2017 MERCEDES\-BENZ S65 AMG
- 2013 to 2014 MERCEDES\-BENZ SLS
- 2024 to 2025 MERCEDES\-MAYBACH EQS SUV 680 4MATIC
- 2021 MERCEDES\-MAYBACH GLS 600
- 2022 to 2025 MERCEDES\-MAYBACH GLS 600 4MATIC
- 2018 to 2020 MERCEDES\-MAYBACH S 560 4MATIC
- 2021 MERCEDES\-MAYBACH S 580
- 2022 to 2025 MERCEDES\-MAYBACH S 580 4MATIC
- 2018 to 2020 MERCEDES\-MAYBACH S 650
- 2023 to 2024 MERCEDES\-MAYBACH S 680
- 2022 to 2023 MERCEDES\-MAYBACH S 680 4MATIC
- 2025 MERCEDES\-MAYBACH S 680 4MATIC
- 2017 MERCEDES\-MAYBACH S550
- 2017 MERCEDES\-MAYBACH S600
- 2017 MERCEDES\-MAYBACH S650
- 2026 MERCEDES\-MAYBACH SL 680 4MATIC\+

JSON: [/v1/bulletins/11027566](/v1/bulletins/11027566)

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