How many engine complaints does the 2018 Mercedes-Benz GLC300 have?

NHTSA lists 29 engine complaints for the 2018 GLC300, which is 33% of the 87 total complaints filed for that model year.

Is there a recall for the 2018 Mercedes-Benz GLC300 engine?

No related recalls are listed in NHTSA data for the engine problem area on this model year.

At what mileage do 2018 GLC300 engine problems typically occur?

The median mileage at failure reported to NHTSA for this problem area is 6,000 miles.

What is the most common engine complaint on the 2018 GLC300?

Multiple owners report the crankcase ventilation regulator valve triggering code P052E and the check engine light, a pattern several describe as recurring.

How does the 2018 GLC300 compare to other years for engine complaints?

The 2018 GLC300's engine complaints are 33% of its total complaints, similar to 2016 (33%) but lower than 2021 (47%) and higher than 2019 (28%).

2018 Mercedes-Benz Glc300 Engine Problems

NHTSA lists 29 engine complaints for the 2018 Mercedes-Benz GLC300, 33% of all 87 complaints filed for the year. The median mileage at failure is 6,000 miles. No related recalls are listed for this problem area.

Engine complaints: 29; 33% of 87
Crashes reported: 0
Fires reported: 1
Injuries reported: 0
Median mileage: 6,000 mi
Related recalls: 0

Typical engine symptoms owners report

Owners report the check engine light coming on with code P052E, tied to the crankcase ventilation regulator valve or breather intake line malfunctioning.
Some describe the vehicle entering limp mode or losing acceleration after a pedal position sensor fault code (P2138), in one case while crossing traffic.
Several owners state the P052E crankcase vent valve issue recurred more than once on the same vehicle after repair.
One owner reported complete engine failure with a broken piston requiring a full engine replacement.
Owners describe the crankcase ventilation problem as common across other Mercedes-Benz vehicles that use the same engine.

When 2018 Mercedes-Benz Glc300 engine complaints were filed

First complaint May 16, 2018, latest Jul 30, 2026.

29 complaints filed with NHTSA from May 2018 to Jul 2026; peak Nov 2023 (4).

Engine recalls for the 2018 Mercedes-Benz Glc300

No safety recalls on record for this model year.

Engine complaints by Glc300 model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

201644 (33%)
201738 (39%)
201829 (33%)
201913 (28%)
202022 (32%)
202131 (47%)
202215 (25%)
202316 (29%)
20247 (33%)
20254 (25%)

Frequently asked questions

How many engine complaints does the 2018 Mercedes-Benz GLC300 have?: NHTSA lists 29 engine complaints for the 2018 GLC300, which is 33% of the 87 total complaints filed for that model year.
Is there a recall for the 2018 Mercedes-Benz GLC300 engine?: No related recalls are listed in NHTSA data for the engine problem area on this model year.
At what mileage do 2018 GLC300 engine problems typically occur?: The median mileage at failure reported to NHTSA for this problem area is 6,000 miles.
What is the most common engine complaint on the 2018 GLC300?: Multiple owners report the crankcase ventilation regulator valve triggering code P052E and the check engine light, a pattern several describe as recurring.
How does the 2018 GLC300 compare to other years for engine complaints?: The 2018 GLC300's engine complaints are 33% of its total complaints, similar to 2016 (33%) but lower than 2021 (47%) and higher than 2019 (28%).