CarRecallWatchThe 2018 Mercedes-Benz C 300 has 18 safety recalls on file with NHTSA.
Owners have filed 99 complaints with NHTSA, including 4 crashes, 1 injury.
The most-reported problem area is Engine (34 reports).
2018 Mercedes-Benz C 300 recalls
Front Roof Panel May Detach, Creating Crash Risk
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a prior repair.
Emergency call system may fail to connect in a crash
A software error in the communication module's SIM card can cause a mobile network connection failure.
Misaligned LED headlights may reduce nighttime visibility
Some vehicles may have had their LED headlights incorrectly adjusted during a repair.
Front roof panel may detach while driving, creating a crash hazard
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a previous repair.
Emergency call system may be disabled, delaying crash help
Some 2017 to 2021 Mercedes-Benz vehicles may have had their communication module inadvertently deactivated during a service visit.
Crash Alert May Send Responders to Wrong Location
Certain 2016-2017 Mercedes-Benz vehicles have a software problem in the communication module that runs the automatic crash notification (eCall) system.
Front seat belts may not fully retract, raising injury risk
Certain Mercedes-Benz C300, AMG C43, and AMG C63 vehicles may have front seat belts that do not fully retract to their stowed position.
Loose Battery Bracket Can Cut Power After a Crash
The 12-volt battery mounting bracket in certain vehicles may not be secured properly.
Front Seatback May Not Lock, Risking Forward Folding in a Crash
The right-side front seatback may not properly lock in place on certain vehicles.
Headlights may be misaligned, reducing night visibility
Some headlights on these vehicles may not be properly aimed.
Steering Connection May Loosen, Reducing Steering Control
On certain 2018 Mercedes-Benz C 300 and E 400 vehicles, the steering coupling may not have been locked correctly at the factory.
Steering May Lock in One Position, Raising Crash Risk
A locknut in the steering rack may break under high load, which could cause the steering to become stuck in one position.
Passenger Airbag Status Light May Show Wrong Status
The infotainment (audio) head unit in these vehicles may incorrectly display the front passenger airbag as "ON" when it is actually off, or the status may not display correctly at all.
Battery Cable Cover May Short Circuit in a Crash, Risking Fire
On certain 2018 Mercedes-Benz C 300 and E 300 vehicles, the cover for the starter battery may not fully cover the live positive electrical wire.
Rear window may loosen and detach while driving
The rear window on these vehicles may have been bonded incorrectly at the factory.
Rear trim may detach and become a road hazard
Some 2017-2018 Mercedes-Benz C-Class convertibles and AMG models may have a bonding problem introduced during production.
Front Seatbacks May Not Lock, Risking Injury in a Crash
The right-side front seatback may not properly lock in place.
Driver Airbag May Deploy Unexpectedly, Raising Injury Risk
The driver's front airbag may deploy without warning because the steering components may not be properly grounded.
Most common 2018 Mercedes-Benz C 300 problems
Problem areas named in the 99 complaints owners filed with NHTSA.
| Problem area | Reports |
|---|---|
| Engine | 34 |
| Unknown Or Other | 20 |
| Structure | 14 |
| Steering | 12 |
| Electrical System | 10 |
| Fuel/Propulsion System | 9 |
| Forward Collision Avoidance | 5 |
| Air Bags | 4 |
| Visibility | 3 |
| Communication | 3 |
What owners report
Front roof panel came detached at hwy speed
The contact owns a 2018 Mercedes-Benz C-300. The contact stated that while driving 70 MPH South on the interstate towards Miami, the front panel detached without warning. The contact pulled over to inspect the vehicle and became aware that the panel between the windshield and sunroof had detached. The contact stated that water started entering the vehicle from several areas. The sunroof was inoperable. The contact called the insurance company. The contact associated the failure with NHTSA Campaign Number: 23V854000 (Structure). The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no additional assistance was provided. The approximate
Transmission failed, yes available for inspection Very bad safety issue Yes it has been confirmed by dealship Yes by the deanship Yes there was warning lamps that appeared in January 2026
The contact's wife owns a 2018 Mercedes-Benz C300. The contact stated that while washing the vehicle, a part of the panoramic roof started moving while depressing the glass. The contact stated that there was water leaking into the vehicle from the glass. Upon investigation, the contact discovered NHTSA Campaign Number: 23V854000 (Structure); however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was filed. The manufacturer confirmed that the VIN was not included in the recall. The contact was then referred to the NHTSA Hotline to report the failure. The failure mileage was unknown.
Check engine light comes on, Error Code P052E, after a lot of research, this is a known defective part by Benz. Huge safety issue not addressed by them. Very costly to fix for a customer. There is a new and improved replacement part from Benz indicating they are aware of the faulty old parts that are currently in those cars but yet they have failed to do a recall.
2018 Mercedes-Benz C 300 questions
Does the 2018 Mercedes-Benz C 300 have any recalls?
Yes. NHTSA lists 18 safety recalls for the 2018 Mercedes-Benz C 300: Front Roof Panel May Detach, Creating Crash Risk; Emergency call system may fail to connect in a crash; Misaligned LED headlights may reduce nighttime visibility; Front roof panel may detach while driving, creating a crash hazard; Emergency call system may be disabled, delaying crash help. Recall repairs are normally free at an authorized dealer.
What are the most common problems with the 2018 Mercedes-Benz C 300?
Based on 99 owner complaints filed with NHTSA, the most-reported problem areas are Engine (34), Unknown Or Other (20), Structure (14).
How do I check if a recall on my 2018 Mercedes-Benz C 300 has been fixed?
Enter your 17-character VIN in our VIN recall check. It shows open recalls that have not been repaired on your specific vehicle. Recall repairs are normally free at an authorized dealer.