Mercedes-Benz GLC Engine problems
146 of the 510 complaints about the Mercedes-Benz GLC (28.6%) concern Engine, making it the model's largest problem area. That share is 1.3× the Engine share across all tracked vehicles.
Analysis
By model year, Engine complaints peak with the 2018 model (32, 32% of that year's complaints) and are lowest for the 2025 model (6). 35 Engine complaints were filed in the last 12 months versus 36 in the 12 months before — a steady pace.
Owners most often describe: “engine light”, “cylinder head”, “check engine”, “crankcase” and “valve”. 9 of these reports (6.2%) describe a crash or fire, with 1 injury and 0 deaths mentioned.
No recall campaign addresses Engine for the tracked model years.
By model year
When complaints were filed
Last 12 months: 35 · Previous 12 months: 36
Common terms in reports
- engine light54
- cylinder head24
- check engine47
- crankcase16
- valve30
- code28
What owners report
The contact owns a 2025 Mercedes-Benz GLC 300. The contact stated that while her husband was driving at 5 to 10 MPH attempting to park the vehilce lunged forward traveling 20 feet and crashed into the house. The air bags deployed.
FIRE! NHTSA Vehicle Safety Complaint – Mercedes-Benz GLC300 Complainant Information: [XXX] [XXX] Phone: [XXX] Email: [XXX] Vehicle Information: 2019 Mercedes-Benz GLC300 4MATIC VIN: [XXX] Purchase Location: Missouri Incident Location: St.
My 2025 Mercedes-Benz GLC 350e displayed a “48V battery malfunction” warning on or about July 1, 2026, while the vehicle was less than one year old. The vehicle was taken to an authorized Mercedes-Benz dealership and remained there until approximately July 20.
My check-engine light recently illuminated, and diagnostic testing identified fault code P06DA00, relating to the oil pump control valve circuit. I have been quoted over $5,000 to replace the oil control valve and oil pump harness.
The vehicle is experiencing an intermittent, sudden, and life-threatening drop into "limp home mode" while driving, creating an severe speed differential with surrounding traffic.First Incident (50,584 miles): The vehicle entered limp mode.
My 2022 Mercedes-Benz GLC 300 (17,700 total miles) suffered a catastrophic structural engine block failure and an explosive loss of propulsion while driving at highway speeds.
Excerpts from complaints filed with NHTSA, trimmed for length. The ODI number is NHTSA's record identifier.
Related recalls
No recall campaign addresses Engine for the tracked model years.
Problem areas · Mercedes-Benz GLC
Mercedes-Benz GLC problems, complaints & recalls by model year ›
Related reading
- Why modern engines burn oil, and what owner complaints revealThe design choices that make many recent engines consume oil, the warning signs owners describe, what counts as normal, and which tracked models draw the most engine complaints right now.
Frequently asked questions
How common are Engine problems on the Mercedes-Benz GLC?
146 of the 510 complaints about the Mercedes-Benz GLC (28.6%) concern Engine, making it the model's largest problem area. That share is 1.3× the Engine share across all tracked vehicles.
Which Mercedes-Benz GLC model years have the most Engine complaints?
By model year, Engine complaints peak with the 2018 model (32, 32% of that year's complaints) and are lowest for the 2025 model (6).
Is there a recall for Mercedes-Benz GLC Engine problems?
No recall campaign addresses Engine for the tracked model years.