Mercedes-Benz AMG GLC63 S 2020

Car

Mercedes-Benz AMG GLC63 S 2020

1 source-linked failure report. Most reported: Engine failure. Typical failure around 5 mo.

Reliability signal — · Insufficient data · data confidence Very Low

1 confirmed failure reports

Reliability summary

What is likely to go wrong, when it happens, and how expensive it can be — from source-linked failure reports. Counts are reports in our database, not a population failure rate.

Reliability signal

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1 confirmed failure report · Insufficient data · Data confidence: Very Low

Need at least 5 confirmed failure-signal reports before showing an A–F grade.

Most common issue
Engine failure
Typical first failure
5 mo
Median of confirmed reports with timing
Median repair cost
—
Reported costs only · market varies
Highest reported repair
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Not a quote · costs differ by country

What breaks?

Failure types

Click a type in the reports section below to filter.

  • Engine failure1 · 100%

When does it break?

Failure timing

Months after purchase, using reports that included timing.

What does it cost?

Reported repair costs

Distribution of owner-reported repair costs— not a quote or guarantee. Labor and parts prices vary by country.

No reported repair costs yet for this model.

Median months to failure

5

Failure reports

1

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Median repair cost

—

Still recommend

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% repaired

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% mfr warranty

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% extended warranty

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% support helpful

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What breaks?

What breaks? · reports

Engine failure

POWER TRAIN,ENGINE

5 months

Government / agencyIndexed Oct 8, 2026Source-linkedVerify source — NHTSA complaint #11382743

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 commands when pulling out into traffic. This is most noticeable while rolling between 5-10 MPH and applying power also while making a sharp turn. The powertrain also is extremely inconsistent in it's response which makes pulling into traffic extremely dangerous. I suspect the problem stems from sensors in the electronic stability program (mb esp), the transmission module and the fly by wire throttle and engine control module. Programing of shifts of the transmission seem to fighting within the transmission itself. All of this adds up to an extremely dangerous situation when driving in traffic. I have taken the vehicle back to the selling dealer (Mercedes Benz of north palm beach Florida) twice only to be told that this is normal. I filed a request with Mercedes Benz of north America to buy the car back without success.

VerifiedEvidence ★★★★☆
View report details

Months until failure

5 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

90%

Verification status

Verified

Evidence quality

★★★★☆ (4/5)

Discussion

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