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2018 Mercedes-benz C-class
Solid pick. The public record on this car is clean for its age. Inspect it, then negotiate with confidence.
125 owner complaints · 0 recalls · data verified July 14, 2026 · source: NHTSA
Why buy?
Engine problems dominate (31% of complaints, typically reported near 34k miles).
Very few owner complaints for its age and sales volume.
Zero recalls, rare for a car this age.
The math, shown
Full methodology →Complaints filed per year
Fading = early teething worked out. Climbing = problems aging in.
How it crashes
NHTSA’s own crash tests, separate from the reliability score above.
5/5 overall
NHTSA 5-Star Safety Rating · 2018 Mercedes-Benz C-Class 4 DR 4WD
Rollover risk in a single-vehicle crash: 11%
3 open NHTSA defect investigations on file, separate from the recalls above.
Source: nhtsa.gov/ratings. Star ratings compare vehicles within the same class and size, not across every car on the road.
The road ahead
What breaks on a 2018 Mercedes-benz C-class, plotted where owners report it happening.
Also reported (mileage varies): Body & structure (15) · Steering (13) · Electrical system (12) · Transmission & drivetrain (6)
Mileage medians come from owners who mentioned an odometer reading in their NHTSA complaint, a rough guide, not a schedule.
Engine
31%39 complaints · typically near 34k mi · 5 in the last 2 years
“My vehicle only had 31,000 miles and I experienced engine failure. I bought a new engine for 16, 500. 00 dollars. Mercedes Benz did nothing. I almost got in to several…”
Body & structure
12%15 complaints · 6 in the last 2 years
“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 …”
Steering
10%13 complaints · 2 in the last 2 years
“car has less than 34,000 miles on it. One day went to drive and the vehicle wouldn't turn and an error message popped up "power steering malfunction, check owners manu…”
Electrical system
10%12 complaints
“According to the dealership, if the car is not started every 3 days, it will shut itself down. The car was towed 6 times, I'm a business woman, my coworkers, friends d…”
Recalls (0)
No recall campaigns on file for this model year.
Before you hand over money
Check the VIN for open recalls
NHTSA’s free lookup shows whether this exact car had its recall remedies completed.
Free NHTSA VIN check ↗Get a pre-purchase inspection
A $150 to $250 independent inspection of this exact 2018 Mercedes-benz C-CLASS beats every score on the internet, including ours.
What to ask forNot set on the 2018? See how every C-class model year scores →
Cross-shopping? Compare the 2018 Mercedes-benz C-class against another car →
What owners say
Real owners of this exact model-year, shown separately from the NHTSA score. If they disagree, that’s worth knowing.