I have the same problem about steering harder when on lower speed, every oil level looks to be perfect.
2015 Mercedes-Benz C-Class steering problems
severe Owners of the 2015 Mercedes-Benz C-Class have filed 28 NHTSA complaints about the steering, typically surfacing around 40,000 miles at roughly $700 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See steering across all vehicles →
Failure mileage
Complaints
28
Recalls
0
Avg fix
$700
| Model year | steering complaints |
|---|---|
| 2011 C-Class | 35 |
| 2012 C-Class | 15 |
| 2013 C-Class | 47 |
| 2014 C-Class | 35 |
| 2015 C-Class (this page) | 28 |
| 2016 C-Class | 17 |
| 2017 C-Class | 15 |
| 2018 C-Class | 13 |
| 2019 C-Class | 5 |
3crashes
3injuries
What stands out
Owners have filed 28 steering complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA steering complaint has been filed on this vehicle in over 5 years — the issue may be aging out of the active population.
The failure pattern owners describe
The 2015 C-Class steering system is producing multiple distinct failures. The most common complaint is sudden loss of power steering assist—the steering wheel locks up hard, warning lights flash on the dash, and owners struggle to turn the wheel enough to reach a safe parking spot. Some of these incidents happen at highway speeds or during turns, creating dangerous situations. The failures are often intermittent: restart the engine or wait a few minutes and steering returns, leaving owners unable to determine if the problem will happen again.
Owners also report hard steering at low speeds, abnormal clunking from the front end linked to loose steering rack hardware, and complete loss of steering control where the wheel becomes unresponsive mid-drive. One owner experienced a three-time spin and crash into a guardrail one week after a dealer completed a recall service for the steering rack.
Dealerships have attributed failures to faulty electrical codes in the steering box, electrical failure in the steering column, and weak batteries. Repair costs cited include a $4,551 steering rack replacement. Mercedes has reset electrical boxes, replaced computer chips, and performed alignments, but owners report uncertainty about whether fixes are permanent. Several owners found that disconnecting the battery briefly temporarily restores function. Multiple owners state their vehicles fell outside applicable recall campaigns, and manufacturer assistance was denied or slow in coming.
Same Mercedes-Benz C-Class steering reports on nearby years: 2012 · 2013 · 2014 · 2016 · 2017
Failure modes owners describe
Power Steering Loss / Electrical Malfunction
The power steering system suddenly loses assist, causing the steering wheel to become extremely stiff and difficult to turn. Owners report warning lights (power steering malfunction, steering wheel symbols) appearing on the dashboard. The failure is intermittent in many cases—restarting the vehicle restores function temporarily or permanently. One narrative mentions a faulty code in the steering electrical box; another indicates an electrical failure in the steering column requiring rack and pinion replacement and steering module reprogramming.
When: Occurs at various mileages (17,000 to 130,000 miles) and speeds (30 mph to 65 mph), including during normal driving and highway use.
Symptoms owners cite: Power steering malfunction warning light; Steering wheel becoming extremely firm or locked; Extreme difficulty turning the steering wheel; Warning messages: 'Power Steering Malfunction, See Operators Manual'; Occasional temporary resolution after restart or waiting 5–10 minutes
Codes mentioned: Faulty steering electrical box code, Steering column electrical failure
Repairs/costs cited: Mercedes dealership advised resetting steering electrical box; steering column was diagnosed as experiencing electrical failure requiring rack and pinion replacement ($4,551 quoted in one case) and steering module reprogramming. Some owners report the issue resolved after factory reset or battery disconnect, but no permanent fix confirmed in most narratives.
Recalls/TSBs owners mention: Mercedes advised dealership to reset the electrical box; denied recall coverage in NHTSA Campaign #15V-845 for at least one owner; referred owners to NHTSA hotline in other cases. One owner reported manufacturer provided no assistance after crash following a recall service.
Steering Rack Looseness / Locknut Failure
The steering rack becomes loose or the locknuts securing it fail, producing abnormal clunking or noise from the front suspension. One owner's independent mechanic diagnosed a loosened steering rack with failed locknuts at 70,000 miles; the same vehicle did not receive repair from either mechanic or dealer.
When: Approximately 70,000 miles.
Symptoms owners cite: Abnormal clunking sound from front suspension; Steering wheel becoming loose or inoperable; No warning lights illuminated
Repairs/costs cited: Steering rack locknuts identified as loose by independent mechanic; dealer confirmed diagnosis but vehicle was not repaired by either shop.
Recalls/TSBs owners mention: Case opened with manufacturer; owner referred to NHTSA hotline. Related to NHTSA Campaign #18V850000 (Steering) but VIN not included in recall.
Steering Wheel Seizure / Grinding Noise
The steering wheel seizes or becomes immobile, sometimes accompanied by abnormal grinding sounds at startup. One owner reported the steering wheel seized at 40,000 miles with grinding noise; another at 8,000 miles with abnormal noise and power steering failure.
When: 8,000 to 40,000 miles.
Symptoms owners cite: Steering wheel seized or immobile; Abnormal grinding sound from the vehicle; Power steering failure simultaneous with seizure
Repairs/costs cited: No repair completed in either case. One owner referred to NHTSA Campaign #18V850000 but VIN not included in recall.
Recalls/TSBs owners mention: No assistance provided; VIN not included in NHTSA Campaign #18V850000 in both cases.
Loss of Steering Control While Driving
Complete loss of steering control during normal driving, including instances where the steering wheel becomes unresponsive or the vehicle veers uncontrollably. One owner at 40–50 mph experienced a three-time spin and crash into a guardrail following a rack-and-pinion recall service. Another at 65 mph lost steering assist. A third at 40 mph reported the wheel becoming inoperable with the vehicle starting to stall.
When: At 30–82,000 miles during active driving at speeds ranging from low-speed to 65 mph.
Symptoms owners cite: Sudden unresponsiveness of steering wheel; Vehicle veering to one side without correction; Complete inability to control steering direction; Power steering assist warning light (in some cases); Vehicle spinning or sliding uncontrollably; Traction control and driving assistance warning lights (post-crash)
Repairs/costs cited: Post-recall service: one owner's dealer reported vehicle was aligned after the crash but independent mechanic found it out of alignment specification. Repair details not provided for other loss-of-control events.
Recalls/TSBs owners mention: One owner reported manufacturer made aware but did not assist. Another owner was told VIN was not under any recall; no further assistance provided.
Hard Steering at Low Speeds
Owners report the steering wheel becoming unusually stiff or hard to turn, particularly at low speeds and during low-speed maneuvers. One owner noted steering difficulty when trying to avert stopped traffic; another observed hardness during normal low-speed driving.
When: Varies; one instance at approximately 82,000 miles during low-speed driving.
Symptoms owners cite: Steering wheel difficult or very hard to turn; Steering hardness at low speeds and during parking; Steering difficulty especially under 5 mph
Repairs/costs cited: No specific repair notes provided. One owner replaced the battery as advised by dealership, but the issue persisted.
Post-Recall Service Steering Misalignment
Following a dealer-performed steering rack and pinion recall service, the vehicle exhibited abnormal steering behavior including a three-time spin at 40–50 mph and a crash into a guardrail. Subsequent independent inspection revealed the vehicle was out of alignment specification despite the dealer's claim of proper alignment.
When: One week after recall service completion, at approximately 55,000 miles.
Symptoms owners cite: Vehicle spinning uncontrollably (three rotations); Steering wheel abnormally positioned to the right; Loss of vehicle control at moderate speed (40–50 mph); Traction control and driving assistance warning lights illuminated; Crash into guardrail
Repairs/costs cited: Dealer performed alignment claiming proper correction, but independent mechanic verified the vehicle was out of alignment specification. Vehicle not repaired to specification; no further details provided.
Recalls/TSBs owners mention: Manufacturer made aware of the failure but did not assist.
Intermittent Power Steering Fault with Dashboard Warnings
Recurring intermittent power steering failures accompanied by multiple warning lights on the dashboard (power steering malfunction, collision assist plus, other unspecified lights). Some owners report temporarily resolving the issue by resetting the vehicle's computer system (unplugging battery for 15+ minutes).
When: Intermittent; one owner reported the issue persisting over several years (2017–2022).
Symptoms owners cite: Power steering malfunction warning; Collision assist plus warning light; Multiple dashboard warning lights simultaneously; Power steering acts up intermittently while driving; Temporary resolution via battery disconnect/computer reset
Repairs/costs cited: Dealership initially attributed issue to weak battery and replaced it; issue persisted. Computer reset via battery disconnect temporarily resolves the problem in some instances, but permanent fix remains elusive.
Steering Wheel Locking / Brake Pedal Simultaneous Failure
During hard braking, the steering wheel, column, and brake pedal locked simultaneously, rendering the vehicle uncontrollable. One owner braking hard to avoid heavy traffic experienced this combined failure, resulting in a rear-end collision; the airbags also failed to deploy.
When: During emergency braking event.
Symptoms owners cite: Steering wheel locking; Steering column locking; Brake pedal locking; Complete vehicle immobility during braking; Inability to steer or avoid collision; Airbag failure to deploy
Repairs/costs cited: Vehicle slid into another vehicle; no repair details provided.
Synthesized from 28 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had steering trouble with your 2015 Mercedes-Benz C-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the steering problem on the 2015 Mercedes-Benz C-Class?
It's a meaningful issue. 28 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $700.
At what mileage does the steering typically fail?
Across the 15 complaints that reported odometer mileage, most steering failures cluster between 8,600 and 70,000 miles, with the median around 40,000. A quarter of owners report trouble before 8,600; a quarter make it past 70,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2015/Mercedes-Benz/C-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.