Mercedes GLC Coupe Problems: What to Know Before Buying
The Mercedes-Benz GLC Coupe offers a sleek, sporty alternative to the standard GLC SUV, blending luxury, performance, and coupe-inspired design. It’s a popular choice for drivers who want a premium SUV with a more dynamic appearance. However, like any vehicle, the GLC Coupe has some known issues worth understanding—especially in the X253 (2016–2022) and X254 (2023–present) generations. Whether you’re considering a GLC 300 Coupe, GLC 220d Coupe, or AMG GLC 43 or 63 Coupe, here are the most common Mercedes GLC Coupe problems to watch for.
1. Transmission Hesitation and Rough Shifts
The GLC Coupe uses a 9G-Tronic automatic transmission, known for smooth shifts when maintained. However, some owners report low-speed hesitation or rough gear changes.
Common symptoms:
- Delay when accelerating from a stop
- Jerky shifts in traffic
- Rough downshifting at high speeds
Software updates or gearbox adaptations often resolve these issues. Verify regular servicing.
2. Infotainment Glitches (COMAND or MBUX)
Depending on model year, the GLC Coupe features either the older COMAND or newer MBUX infotainment system. Both systems occasionally suffer from bugs.
Typical complaints:
- Frozen or blank screens
- Bluetooth disconnections
- Navigation errors
- Voice control lag
Most issues are software-related and can be fixed by updating the system at a dealer.
3. Limited Rear Visibility
Due to its sloping roofline and sporty design, the GLC Coupe offers less rear visibility than the standard GLC SUV.
Concerns include:
- Small rear window
- Reduced rear headroom
- Heavier reliance on cameras and parking sensors
Ensure the 360-degree camera and blind spot monitoring systems are functioning properly during a test drive.
4. Suspension Stiffness and Ride Quality
Sport-tuned suspensions—especially on AMG-Line models—can feel too firm on uneven roads.
Reported issues:
- Excessive road noise
- Harshness on potholes or rough surfaces
- Clunking sounds from suspension components
Consider the standard suspension setup or models equipped with adaptive damping for a smoother ride.
5. Electrical and Sensor Faults
As with many modern luxury vehicles, the GLC Coupe may suffer from occasional electrical or sensor-related issues.
Examples include:
- False sensor warnings
- Lane assist or adaptive cruise failures
- Parking assist malfunctions
- Keyless entry or ignition glitches
Most of these can be diagnosed through a scan tool and resolved with sensor calibration or replacement.
6. DPF Issues in Diesel Models
Diesel variants like the GLC 220d or GLC 300d may develop Diesel Particulate Filter (DPF) problems when used mainly for short trips.
Warning signs:
- DPF warning light
- Power loss
- Increased fuel use
Frequent highway driving can help keep the DPF clean. Confirm the DPF’s condition when purchasing a used diesel model.
Final Thoughts: Is the Mercedes GLC Coupe Reliable?
Yes. With proper maintenance, the Mercedes GLC Coupe offers a reliable and luxurious driving experience. Most of its common issues are manageable through software updates, timely servicing, and vehicle inspections.
Before buying:
- Review service records
- Inspect the suspension and infotainment system
- Check sensor functionality and electronics
- Confirm that software updates and recalls have been completed
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