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Service bulletins for the 2021 Mercedes-Benz METRIS

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.

40 on file from NHTSA, as of 2026-10-19.

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Only bulletins with type: Service bulletin are shown. Show all

Bulletins, newest first
LI54_30-N-0807012026-08-03. Service bulletin. UNKNOWN OR OTHER. ASSYST PLUS service reminder appears earlier than expected due to vehicle operating conditions Complaint The ASSYST PLUS service reminder appears earlier than expected. The customer or dealer may report that the vehicle did not reach the starting maintenance interval shown in vehicle documentation, option coding, sales literature, or the Owner's Manual. The service reminder may appear significantly earlier than anticipated even though no faults are stored and no malfunction is present in the vehicle. The remaining distance and remaining time continue to decrease normally until the service reminder is displayed. Cause This condition is not caused by a malfunction of ASSYST PLUS. ASSYST PLUS is a dynamic maintenance management system that continuously evaluates vehicle usage and opera-ting conditions to determine maintenance requirements. The starting maintenance interval specified by variant coding represents a maximum interval that may only be achieved under favorable operating conditions. Actual maintenance intervals may be significantly shorter depending on vehicle use. Vehicle operating conditions such as driving conditions, engine load, engine operating conditions, idling, short-trip operation, environmental influences, oil aging, and Diesel Particulate Filter (DPF) regeneration activity may reduce the maintenance interval from its starting value. These conditions may accelerate engine oil aging through increased soot loading, fuel dilution, moisture accumulation, and additional engine operating stress. As a result, the remaining distance and remaining time until the next service may be reduced from the starting maintenance interval. Remedy Do not replace any parts. A due service must be assumed if the maintenance data calculated by ASSYST PLUS indicates that service is required.
LI80.20-N-0796972026-07-02. Service bulletin. STRUCTURE:BODY. Acoustic Warning or message occurring when a closed sliding door is not recognized Complaint Customer may state the warning message or indicator accompanied by acoustic tone alerting the sliding door is ajar when the door is completely closed Cause There are several reasons that lead to the failure occurring: - Mechanical damage through bending when loading and unloading - Worn contact plates --> After detachment of silver plating, the coper plate is corroded - Movement of sliding door/body when driving --> Contact pins do not always make contact with contact plate --> Central locking system fault message in instrument cluster Remedy In a problem case, replace contact switch for vehicles with +T50/+T55/+EL9 or contact plate with A4478201903. Remember to check the fit of the sliding doors and make any necessary adjustments as per AR72.16-S-1023E (447/448) and AR72.16-D-1023TS (907/910). Further valid damage codes: 82326 Contact switch for central locking system on sliding door 82347 Contact plate for central locking system on sliding door 53196 K/Z contact plate for central locking system on sliding door 82645 Contact switch for sliding door
LI49.10-N-0805282026-07-02. Service bulletin. FUEL/PROPULSION SYSTEM. OM642 DPF Filter Cracked or Broken Complaint Vehicle will not start or exhibits noisy exhaust. Check Engine Lamp (CEL) is on. Multiple control unit communication and system faults may be present, including but not limited to: 134800, 134900, 11B300, 11EC00, 15E100, 155700, 162500. Additional events codes may include: 134300, 102200, 163400, 16CE00. In many cases, multiple unrelated faults are stored due to electrical disruption from wiring damage rather than indivi-dual component failure. Cause The DPF filter is cracked, broken, or leaking, allowing hot exhaust gas to escape from the exhaust system. Depending on the location of the break or leak, hot exhaust gas may be directed toward the main wiring harness and/ or the SCR (Selective Catalytic Reduction) dosing valve assembly. This heat exposure can result in: • Internal melting of wiring insulation within the harness • Short to ground conditions and loss of communication between control units • Damage to the dosing valve and/or heated AdBlue line Damage to the wiring harness may not be visible externally, as the outer tape can remain intact while the internal wires are melted and fused together. Remedy Inspect the DPF assembly for cracks, separation, or leakage. Do not proceed with further diagnosis or component replacement until the exhaust leak source has been identified and confirmed. If any damage is found, replace the DPF filter assembly. Based on the location of the failure, inspect all components in the path of the exhaust leak, including the dosing valve assembly and main wiring harness. The wiring harness must be opened in any area exposed to the exhaust leak to visually inspect the individual wires. External inspection alone is not sufficient to determine harness condition. Repair or replace any damaged wiring in accordance with approved repair procedures. Replace any dosing system components that show signs of heat damage. Failure to identify and repair all heat-affected components will result in repeat faults or no-start conditions.
LI47.50-N-072080_42026-06-02. Service bulletin. UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. Check engine light on and FC P146264 stored in engine and fuel pump control units Complaint Check engine light active and FC P146264 Temp. and pressure sensor B4/15 is stored in Engine control unit and Fuel pump control unit. Cause Software parameter in Fuel pump control unit. Remedy Update fuel pump control unit (FSCU) to software version A0009024488 A0009030664. Clear fault codes and check for any additional symptoms.
LI27.19-N-0797932025-10-07. Service bulletin. POWER TRAIN. Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. Cause Transmission control unit Y3/8n4 Remedy For vehicles with 722.9 transmission: Ensure LI54.15-P-057373 is performed before replacing any component parts. After processing and complying with the above document(s): 1. Perform an ignition reset on Y3/8n4 (VGS) 2. Inspect transmission connector for loose connections, damaged wiring or pins and any other concerns. If communication with the VGS cannot be established, the complete valve body ('electrohydraulic controller unit (EHS)') must be replaced. Installation of a VGS repair kit is not permitted in this case as it is not possible to transfer the necessary valve characteristics without communication with the original control unit.
LI01.20-N-079115_12025-05-02. Service bulletin. ENGINE. Check engine light illuminated - Fault code current P04D-B79 The crankcase ventilation system is interrupted. Complaint: Check engine light on. Fault code P04DB79 is current in the engine control module (N3/10). Cause: Open circuit or high resistance to crankcase vent line contact Remedy 1. Check the electrical connector for S208 vent line contact switch. Refer to attached photo of connection location. 2. Ensure the bolted connection is secure and bolt can be torqued (9Nm). 3. Check continuity from vent line connection to ME control unit. Repair wire if damage is found.
LI82.35-N-0789302025-04-03. Service bulletin. VISIBILITY/WIPER. Warning Lamp "Washer Fluid Empty" Yet Reservoir Is Not Empty Complaint: Warning lamp "washer fluid empty", even thought the washer fluid reservoir is full Cause: Insufficient electrical conductivity of the washer fluid, as the washer fluid was mixed with distilled water. Tip: The washer fluid sensor detects the electrical conductivity. If air is present without electrical conductivity between the measuring points, as is the case with an empty tank, an empty tank is detected by the sensor. Distilled water also does not have electrical conductivity, meaning that the sensor detects an empty tank, even if this is not the case. Remedy: Fill reservoir with standard washer fluid and water (no distilled water) in an adequate ratio in order to ensure electrical conductivity. Exchange of the reservoir with a welded-in sensor is only required if filling with conductive washer fluid has not provi- ded a remedy. This can be made certain by utilizing water with a light amount of salt dissolved in to it for stronger con- ductivity.
LI07.70-N-0788242025-03-04. Service bulletin. FUEL/PROPULSION SYSTEM. Complaint Fault code P06DA00 is found current or stored in engine control unit. Check engine light may be activated. Cause Various causes Remedy Up to Model year 2018: Fault code P06DA00 can be disregarded if not activating the check engine light, unless otherwise specified in the gui- ded test. The vehicle continues to operate as designed. Further causes should be investigated if complaint of check engine light is received. Model year 2019 and later: Fault code P06DA00 will activate check engine light as of model year 2019. No driveability concerns will be observed, only illumination of the CEL. This fault code indicates high resistance or open in the circuit to Y130 oil pump control valve. Perform guided test for component Y130 under list of tests in ME. Diagnose location of high resistance or open in Y130 circuit and repair as necessary. Warranty claims submitted without supporting guided test results may be subject to debit.
LI13.22-N-078825_12025-02-06. Service bulletin. ENGINE. M274 poly-V belt squeaking noises, falls off, not aligned, broken
LI49.00-N-0786082024-12-04. Service bulletin. ENGINE. SMOG/Emissions Test fail due to one or more Readiness Monitors not set Complaint: The vehicle has failed the State Emissions Certification because one or more of the OBDII readiness monitors are not completely set. Cause: One or more of the following Readiness Monitors are not fully set within XENTRY: Misfire Monitoring - Injection System Fuel System Monitoring - Injection System, Fuel System, EGR Valve, O2 Sensor NMHC Catalyst Monitoring - NMHC/Diesel Oxidation Catalyst NOx Aftertreatment Monitoring - SCR Catalyst System Boost Pressure System Monitoring - Turbocharger, Charge Air System Exhaust Gas Sensor Monitoring - O2 Sensor, NOx Sensors Diesel Particulate Filter Monitoring - Diesel Particulate Filter System Exhaust Gas Recirculation System Monitoring - EGR Valve and system Remedy: Please complete the required driving conditions to fully set the incomplete Readiness Monitor. DO NOT: - Erase any fault codes. If fault codes are present, process these and allow the readiness drives to clear fault codes. - Flash or SCN code the CDI or SCR control units. - Perform a manual DPF regeneration, unless instructed below. - Disconnect the main battery.
LI08.10-N-0785452024-11-05. Service bulletin. POWER TRAIN. Complaint: Noises when reversing slowly <5 km/h (squeaking) Cause: There is a seal in the electric drivetrain that seals off the coolant system from the electric motor. This seal is moistened with coolant during forward travel. As a result of the change in rotational direction when reversing slowly, it may be the case that this sealing ring is no longer moistened. Squeaking noises may occur as a result of the so-called "stick-slip effect". This behavior does not impact the function or durability of the sealing ring and electric drivetrain. Remedy: Do not replace any parts. Explain the cause of the noises to the customer.
PDAGLACKHA2024-01-29. Service bulletin. EQUIPMENT; STRUCTURE; VISIBILITY. Mercedes-Benz AG has determined that on certain Metris (447 platform) vehicles, the fuel pump impeller might not meet specifications in regards to material characteristics. As a consequence, the impeller might deform. It might therefore come into contact with the fuel pump housing, leading to a mechanical resistance. In some instances, this could lead to a shutdown of the fuel pump. As a result, the vehicle could lose propulsion, and increase the risk of a crash or injury.
20231000062024-01-29. Service bulletin. FUEL SYSTEM, GASOLINE. Mercedes-Benz AG, the manufacturer of Metris vans, has determined that on certain Metris (447 platform) vehicles the fuel pump impeller might not meet specifications in regards to material characteristics. As a consequence, the impeller might deform and come into contact with the fuel pump housing, leading to a mechanical resistance. In some instances, this could lead to a shutdown of the fuel pump. As a result, the vehicle could lose propulsion, which could increase the risk of a crash or injury.
MB Initial NCU2023-08-28. Service bulletin. FUEL SYSTEM, OTHER:DELIVERY. Replace Fuel Delivery Module.
LI82.85-N-0740542023-08-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:INFOTAINMENT. The connection of the customer's smartphone connected via the original USB cable is disconnected after an undefined period of time for no apparent reason. The Apple iPhone 12 and subsequent models are primarily affected by this. Hardware for radio control unit (Audio) (N87/15) Modification to hardware for radio control unit (Audio) (N87/15). Note: In isolated cases, the replacement chain is not depicted correctly in XENTRY Parts Information (XPI). Please ensure that one of the following replacement part numbers (suitable for the vehicle equipment) is ordered: • Audio30 - A4479002421 • Audio40 - A4479002721 Note: Please refer to this LI in the "Notes" section of the warranty claim
LI46.35-N-0766042023-08-02. Service bulletin. STEERING. Various concerns in relation to electric power steering including Rattling/humming noise from electric power steering when steering fully turned (see video recordings 01 and 02).
NCU-VS2SIMKOM2023-01-03. Service bulletin. ELECTRICAL SYSTEM. (RC)Update Hermes Communication Module Software
MB Launch NCU-VS2022-11-21. Service bulletin. FUEL SYSTEM, GASOLINE. (SC)Inspect Clamps on Heating Circuit Hose Lines
Recall Notificat2022-08-08. Service bulletin. ELECTRICAL SYSTEM. (RC)Update Hermes Communication Module Software
Service and Part2022-08-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. (SC)Provide Supplementary Operator's Manual
LI82.85-N-0749252022-07-05. Service bulletin. ELECTRICAL SYSTEM. Complaint In order to better analyze the situation in the field and the wide variety of complaints relating to the Metris Infotainment System Audio 30/40 (GARMIN), a questionnaire must be completed and a log file created for the aforesaid component when a complaint is made. In addition, please create a PTSS case and add the questionnaire and the log file to this as attachments. The procedure for completing the questionnaire and creating the log file is described under "Remedy" It is particularly important that you pay attention to the checklist and the requirements for creating a PTSS case (see point 5 "Remedy") relating to the Metris Infotainment System Audio 30/40 (GARMIN) Cause Under analysis Remedy IMPORTANT: Before creating a PTSS case, it is essential to check whether a LI for a complaint has already been published and whether the Metris Infotainment System Audio 30/40 (GARMIN) has the latest software release installed.
LI82.85-N-0749222022-07-05. Service bulletin. ELECTRICAL SYSTEM. Complaint The volume of the radio/radio - navigation (RD) control unit (N87/15) is too quiet even at maximum volume. Cause Radio/radio - navigation (RD) control unit (N87/15) software Remedy Remedy of new software for radio/radio - navigation (RD) control unit (N87/15) is expected to be available in Q4/2022
LI82.85-N-0749212022-07-05. Service bulletin. ELECTRICAL SYSTEM. Complaint The person being called/caller is hard to understand when traveling at speeds greater than 80 km/h(50mph) in the vehicle. Cause Radio/radio - navigation (RD) control unit (N87/15) software Remedy Remedy of new software for radio/radio - navigation (RD) control unit (N87/15) is expected to be available in Q4/2022.
LI82.85-N-0749202022-07-05. Service bulletin. ELECTRICAL SYSTEM. Complaint - Regionally strong broadcasting stations are poorly received or not received at all. - Interruptions to reception when driving Cause - Third-party installations (e.g. GPS trackers) - Periphery of antenna (e.g. stone chipping on windshield, antenna amplifier, etc.) - Broadcaster reception area reached, no alternative frequency available - Radio/radio - navigation (RD) control unit (N87/15) Remedy Important note: In light of this, we would like to point out that third-party electrical installations/electrical retrofitting operations in the vehicle can significantly contribute to faults. The vehicle must always be checked in its standard condition.
LI82.85-N-0749192022-07-05. Service bulletin. ELECTRICAL SYSTEM. Complaint As soon as a telephone call via Apple CarPlay is ended, the connection to the customer's connected smartphone is disconnected and the radio/radio - navigation (RD) control unit (N87/15) can no longer be operated. Cause 1. Radio/radio - navigation (RD) control unit (N87/15) software 2. Apple iOS software status Remedy 1. Update radio/radio - navigation (RD) control unit (N87/15) software to the latest software status. 2. Update software of customer smartphone to current iOS version.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.