2018 Mercedes-Benz C-Class steering problems
severe Owners of the 2018 Mercedes-Benz C-Class have filed 13 NHTSA complaints about the steering at roughly $700 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See steering across all vehicles →
| Model year | steering complaints |
|---|---|
| 2014 C-Class | 35 |
| 2015 C-Class | 28 |
| 2016 C-Class | 17 |
| 2017 C-Class | 15 |
| 2018 C-Class (this page) | 13 |
| 2019 C-Class | 5 |
| 2020 C-Class | 3 |
The failure pattern owners describe
Thirteen owners reported steering problems in 2018 C-Class vehicles. The most serious defect is a cracked steering rack locknut, covered under NHTSA recall 18V850000. One owner experienced complete loss of steering control on a curved onramp, causing the vehicle to crash into a wall and an embankment—described as a total loss by the body shop. Recall letters warn that low-speed lateral maneuvers can cause the nut to fracture and steering to fail, increasing crash risk.
The recall remedy has been unavailable for extended periods. As of mid-2019, nearly six months after notification, owners reported dealers nationwide unable to provide repair parts with no confirmed availability date. Multiple owners called dealerships in California, Florida, and other states—all said parts were not in stock.
Other steering failures include one car with an abnormal transmission noise at 57,000 miles, diagnosed by an independent mechanic as requiring rack-and-pinion replacement, though a dealer could not replicate the issue. Another owner got a "power steering malfunction" warning at under 34,000 miles, but the dealer found no physical damage or wear.
One owner also complained of steering wheel leather deteriorating eight months after purchase on a new vehicle, with the dealer refusing warranty coverage and quoting $2,117 for replacement.
Same Mercedes-Benz C-Class steering reports on nearby years: 2015 · 2016 · 2017
Failure modes owners describe
Steering rack locknut cracking
Internal material cracks in the steering rack locknut, which under low-speed lateral maneuvers can fracture and cause complete loss of steering control.
When: Various speeds and driving conditions; one incident at 57,000 miles
Symptoms owners cite: Complete loss of steering ability; Vehicle continues straight and cannot be controlled; Abnormal sound from steering/transmission area
Repairs/costs cited: One independent mechanic diagnosed rack and pinion replacement needed; dealer could not replicate failure. One vehicle quoted at $2,117 for steering wheel replacement.
Recalls/TSBs owners mention: NHTSA Recall Campaign 18V850000 (and related 18V872000); remedy listed as incomplete/not yet available as of mid-2019. Parts consistently unavailable at multiple dealerships across the country.
Steering wheel leather deterioration
Steering wheel cover material deteriorating prematurely on new vehicle.
When: 8 months after purchase (approximately 12/2018)
Symptoms owners cite: Visible deterioration of steering wheel
Repairs/costs cited: Dealer quoted $2,117 for new steering wheel; offered to cover only 30%. Owner did not authorize repair.
Recalls/TSBs owners mention: Covered under standard warranty; dealer initially refused warranty coverage and suggested alternative repair through independent shop.
Power steering malfunction warning
Power steering system throws malfunction warning despite no visible faults detected by dealer inspection.
When: Before 34,000 miles
Symptoms owners cite: Error message: 'power steering malfunction, check owners manual'; Vehicle would not turn
Codes mentioned: Power steering malfunction
Repairs/costs cited: Dealer inspection found no physical damage or wear; failure could not be replicated; vehicle not repaired.
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Common questions
How serious is the steering problem on the 2018 Mercedes-Benz C-Class?
It's a meaningful issue. 13 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $700.
At what mileage does the steering typically fail?
Based on the 13 complaints filed, steering issues most often appear around 57,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $700 for steering repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to steering?
No active recalls currently cover steering issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.