NHTSA (USA)Critical
At a glance
What can fail
A locknut in the steering rack may break under heavy load, potentially causing the steering to lock in one position.
What the fix does
Dealers will replace the steering rack at no cost to you.
The 2018 Mercedes-Benz AMG C63S has 7 recalls, the most serious being a driver airbag that can deploy without warning, raising the risk of injury and loss of vehicle control.
A separate airbag concern involves the passenger seat sensor, which can incorrectly show the front passenger airbag as active when it will not actually deploy in a crash, leaving that occupant unprotected. Two seat recalls affect vehicles with AMG performance seats: the front seatback may not lock properly on one side and can fold forward in a crash, and the backrest rail and fitting may not be properly welded, allowing the seat to fail under crash loads. On the steering side, certain rear-wheel-drive models have a rack and pinion defect that can compromise steering control. There are also two body-related concerns on Cabriolet trims: the rear window can loosen and detach, becoming a hazard on the road, and the rear beltline trim can separate from the vehicle while driving.
At a glance
What can fail
A locknut in the steering rack may break under heavy load, potentially causing the steering to lock in one position.
What the fix does
Dealers will replace the steering rack at no cost to you.
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Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The passenger side air bag status may not display correctly on the instrument cluster in certain 2018-2019 C-Class and GLC-Class vehicles with Audio 20 head units.
What the fix does
Dealers will update the audio head unit software at no cost to correct the air bag status display.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The rear window may not be properly bonded to the vehicle, which can cause it to loosen and detach.
What the fix does
Dealers will rework the rear window bonding at no cost to restore a secure attachment.
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 backrest rail and fitting on driver and front passenger AMG performance seats may not be properly welded, potentially causing failure.
What the fix does
Dealers will inspect the backrest frame welds and replace backrests as needed at no cost.
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.