NHTSA (USA)Medium Risk
At a glance
What can fail
A software error causes the eCall emergency system's date and time to be incorrect, which may result in an inaccurate vehicle location being sent during an emergency call.
What the fix does
The 2017 Mercedes-Benz C63S AMG has 5 recalls, the most serious involving the driver airbag, which can deploy without warning and raise the risk of a crash and injury.
The front seatbelt pretensioners may not fire correctly in a crash, leaving front occupants without the full restraining force the belt is designed to deliver. On a related note, the front seatback locking mechanism on the right side of the seat can fail to hold the seatback in position, meaning the seat can fold forward in a collision. Both of these issues affect restraint during a crash, and this vehicle is a cabriolet configuration where the seat concern applies. On the body side, a bonding issue with the rear beltline trim on cabriolet models means that strip of trim can peel away from the car while driving and become a road hazard for other vehicles. The remaining recall involves the emergency call system, where a software fault causes the system to report an incorrect date, time, and potentially incorrect location when an emergency call is placed, which could slow down a response if the vehicle is ever in a serious accident.
At a glance
What can fail
A software error causes the eCall emergency system's date and time to be incorrect, which may result in an inaccurate vehicle location being sent during an emergency call.
What the fix does
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Mercedes-Benz will send a remote software update to your vehicle. Dealers will verify the update worked or install a new communication module software at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A bonding problem during manufacturing can cause the rear beltline trim to separate from the vehicle.
What the fix does
Dealers will inspect the rear beltline trim and replace it if needed at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The right seatback on front seats may fail to lock properly, potentially allowing the seat to move unexpectedly.
What the fix does
Dealers will inspect the front seatback locks and replace them if needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver's airbag may deploy unexpectedly if the steering components lack proper grounding and the airbag clockspring is broken, allowing electrostatic discharge to trigger deployment.
What the fix does
Dealers will add grounding to the steering components to prevent electrostatic discharge from triggering the airbag.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The front seat seatbelt pretensioners may not work properly during a crash, reducing protection for front occupants.
What the fix does
Dealers will replace the front seat belts at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.