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Mercedes-Benz C 300 Recall 22V678: Trunk Moisture Can Short Circuit Wiring, Risking Lights, Camera and Fire

NHTSA campaign 22V678, reported September 12, 2022, 6,752 vehicles potentially affected.

What this recall means for you

Moisture can build up in the trunk and leak into the signal acquisition module (SAM), an electrical control unit. This can cause an electrical short circuit that may lead to rear exterior lighting failure, unintended folding of the rear seat, and rearview camera failure, which could increase the risk of a crash or injury. The short circuit may also increase the risk of a fire.

If you own a 2022 Mercedes-Benz C 300 covered by this recall, dealers will install a cover over the SAM free of charge. Owner notification letters were mailed December 2, 2022. You can also contact Mercedes-Benz USA customer service at 1-800-367-6372, referencing MBUSA recall number 2022090011.

To check whether your vehicle has any open recalls, enter your VIN on the NHTSA recall lookup or ask an authorized Mercedes-Benz dealer to check it for you.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 22V678Mercedes-Benz USA, LLC
Component
ELECTRICAL SYSTEM:WIRING: REAR COMPARTMENT/TRUNK
Problem
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022 C300 vehicles. Moisture accumulation in the trunk may leak into the signal acquisition module (SAM), causing an electrical short circuit.
Risk
An electrical short circuit in the SAM could lead to various malfunctions, such as rear exterior lighting failure, unintentional rear seat folding, and rearview camera failure, increasing the risk of a crash or injury. In addition, an electrical short circuit might increase the risk of a fire.
Remedy
Dealers will install a cover for the SAM, free of charge. Owner notification letters were mailed December 2, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022090011.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Affected vehicles

Mercedes-Benz C 3002022