Defect
On certain vehicles, the 12-volt starter battery may not be properly secured by its mounting bracket. In a crash, the battery may shift and the terminals might disconnect. This could interrupt power to the vehicle, which would affect multiple post-crash systems. It is also possible that the battery could detach from the vehicle. Note: A loose battery could cause rattling or knocking noises from the engine compartment while driving.
Safety Risk
A failure of the post-crash systems could increase the risk of injury. A battery that detaches from the vehicle could create a road hazard for others and increase the risk of a crash.
Remedy
Mercedes-Benz will notify owners by mail and instruct them to take their vehicle to a dealer to replace the battery mounting bracket.