Mercedes-Benz GLC-Class problems
77 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.
Buyable on the data — keep up the usual maintenance and inspect normally.
- No systemic severe-failure pattern in the complaint record
- Reliability score 8.0/10 — above 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 2020 Mercedes-Benz GLC-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 — 17 owner reports · tends to show around 32,500 mi · ~$3,100 to fix
- electrical — 10 owner reports · tends to show around 27,225 mi · ~$850 to fix
- powertrain — 6 owner reports · tends to show around 12,650 mi · ~$2,500 to fix
- lighting — 5 owner reports · tends to show around 65,000 mi · ~$250 to fix
⚠ The one to take seriously: electrical is flagged severe on this model , showing up around 27,225 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: 8.0/10 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 2020 Mercedes-Benz GLC-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 7 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
The contact owns a 2020 Mercedes-Benz GLC300. The contact stated that while stopped at a red light, the vehicle started shaking and jerking. The check engine warning light was illuminated. The vehicle was taken to a dealer where it was diagnosed that the cylinder head needed to…
This vehicle is unsafe. When driving in traffic the engine/transmission will not deliver power in response to throttle application, it is also inconsistent in it's response from one time to the next. The vehicle will hesitate for up to 4-5 seconds before responding to throttle…
The engine in my 2020 Mercedes-Benz GLC 300 suddenly malfunctioned while driving on two separate occasions. The vehicle began shaking violently and lost power without warning. I could not accelerate and had to pull over immediately. I turned the vehicle off and restarted it to…
The contact owns a 2020 Mercedes-Benz GLC300. The contact stated that while operating the vehicle, the 12-Volt battery warning light remained illuminated. The contact stated that while driving at various speeds, the vehicle shut off. The failure also occurred while driving on a…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2020 Mercedes-Benz GLC-Class reliable?
Mostly yes. With a reliability score of 8.0 out of 10 based on 77 owner complaints filed with NHTSA, the 2020 Mercedes-Benz GLC-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 2020 Mercedes-Benz GLC-Class?
On the NHTSA data, the 2020 Mercedes-Benz GLC-Class does not need avoiding. Buyable on the data — keep up the usual maintenance and inspect normally. The record behind that call: No systemic severe-failure pattern in the complaint record; Reliability score 8.0/10 — above 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 2020 Mercedes-Benz GLC-Class?
Inspect the engine first — it's the most-reported issue on this model, with 17 owner complaints filed. Typical failure occurs around 32,500 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 2020 Mercedes-Benz GLC-Class a good used car to buy?
It scores 8.0 out of 10 on our NHTSA-based read of 77 owner complaints. The main thing to watch is engine. Typical failure occurs around 32,500 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 2020 Mercedes-Benz GLC-Class?
Based on NHTSA records, the most-reported issue is engine, with 17 complaints filed. Typical failure occurs around 32,500 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 32,500 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Mercedes-Benz GLC-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 2020 Mercedes-Benz GLC-Class?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 77 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.