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Mercedes-Benz AMG S63 4MATIC Recall 15V652: Engine May Stall When Coasting to a Stop, Risking a Crash

NHTSA campaign 15V652, reported October 14, 2015, 3,177 vehicles potentially affected.

What this recall means for you

A software error in the engine control unit can cause the engine to stall while the vehicle is coasting to a stop, such as at a traffic light. Drivers may mistake the stall for a planned shut-down from the ECO-Start function, but the engine will not restart automatically when the brake pedal is released. The vehicle can be left immobilized, which increases the risk of a crash.

The remedy is free. Dealers will update the engine control unit software at no cost to the owner. Owners can also contact Mercedes-Benz customer service at 1-800-367-6372, and should check their VIN for open recalls.

If you own an affected vehicle, schedule the software update with an authorized dealer as soon as possible.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 15V652Mercedes-Benz USA, LLC.
Component
ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:DELIVERY
Problem
Mercedes-Benz USA LLC (Mercedes-Benz) is recalling certain model year 2014 S63 AMG sedans and 2015-2016 S63 AMG 4Matic sedans and coupes manufactured May 14, 2013, to September 18, 2015. In the affected vehicles, due to a software error within the engine control unit, the vehicle may stall when coasting to a stop, such as at a traffic light.
Risk
The vehicle stall may be interpreted by the driver to be a planned shut-down as part of the ECO-Start-function. However, the engine will not restart automatically after releasing the brake pedal, immobilizing the vehicle and increasing the risk of a crash.
Remedy
Mercedes-Benz will notify owners, and dealers will update the engine control unit software, free of charge. The recall BEGAN ON DECEMBER 2, 2015. Owners may contact Mercedes-Benz customer service at 1-800-367-6372. Mercedes-Benz's number for this recall is 2015100003.
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.safercar.gov.

Affected vehicles

Mercedes-Benz AMG S632014
Mercedes-Benz AMG S63 4MATIC20152016