Mercedes-Benz C-Class problems
251 owner complaints with NHTSA, no active recalls. Here's where owners say it breaks.
Solid reliability overall. Common issues are concentrated in a few systems.
Worth owning if you verify the specific issues below before you buy.
- Electrical system: 26 complaints, classified severe
- Reliability score 7.4/10 — around the segment average
Our read of the federal NHTSA complaint and recall record for this exact year and model — not a substitute for a pre-purchase inspection. How we score.
Buying a used 2017 Mercedes-Benz C-Class? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or make the seller fix it before you sign.
What to inspect on this specific car
- engine — 60 owner reports · tends to show around 37,160 mi · ~$3,100 to fix
- electrical — 26 owner reports · tends to show around 36,800 mi · ~$850 to fix
- seatbelts — 23 owner reports · tends to show around 32,592 mi · ~$500 to fix
- body — 21 owner reports · tends to show around 61,338 mi · ~$1,500 to fix
⚠ The one to take seriously: electrical is flagged severe on this model , showing up around 36,800 mi. Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — no active recalls on this model right now, but confirm none were opened after this car was built.
Verdict for buyers: 7.4/10 model. The priciest documented failure is engine (~$3,100) — get the seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report tells you what this exact car has been through. Smart buyers get both.
See the full pre-purchase inspection checklist →Ask anything about your 2017 Mercedes-Benz C-Class
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in this vehicle's actual NHTSA record, not generic advice.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
Top trouble spots 8 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
My car suddenly turned off at a stop sign. After I restarted it, it turned back on and my engine light turned on. I called the dealership and after inspection I was told that the valve for my crankcase was malfunctioning. The total cost, including both parts and labor are $1775.…
Tl* the contact owns a 2017 Mercedes benz c300. The contact stated that while driving 55 MPH and was going around a curve in the road, an abnormal sound was heard. The sun roof exploded without impact. The contact stated that the sun roof glass fell inside the cabin of the…
11 months old car and around 3,000 miles - check brake pad warning went off. Will take the car to the dealer to fix the issue.
Steering wheel malfunction. Car parked at garage and when I went to start I got the malfunction message and the steering wheel would not turn. I called Mercedes and they will tow the car tomorrow. For a brand new 2017 Mercedes this is unacceptable.
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2017 Mercedes-Benz C-Class reliable?
Mostly yes. With a reliability score of 7.4 out of 10 based on 251 owner complaints filed with NHTSA, the 2017 Mercedes-Benz C-Class is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2017 Mercedes-Benz C-Class?
The 2017 Mercedes-Benz C-Class is acceptable, with specific caveats. Worth owning if you verify the specific issues below before you buy. The record behind that call: Electrical system: 26 complaints, classified severe; Reliability score 7.4/10 — around the segment average. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2017 Mercedes-Benz C-Class?
Inspect the engine first — it's the most-reported issue on this model, with 60 owner complaints filed. Typical failure occurs around 37,160 miles. Average repair cost runs about $3,100 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2017 Mercedes-Benz C-Class a good used car to buy?
It scores 7.4 out of 10 on our NHTSA-based read of 251 owner complaints. The main thing to watch is engine. Typical failure occurs around 37,160 miles. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2017 Mercedes-Benz C-Class?
Based on NHTSA records, the most-reported issue is engine, with 60 complaints filed. Typical failure occurs around 37,160 miles. Average repair cost runs about $3,100 at an independent shop.
What's the most expensive thing that goes wrong?
The engine is one of the costlier repair items. Average repair cost runs about $3,100 at an independent shop. Typical failure occurs around 37,160 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Mercedes-Benz C-Class has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2017 Mercedes-Benz C-Class?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 251 complaints on file and the costliest repair averaging $3,100, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.