Mercedes GLC Problems: What To Know Before Buying

May 9, 2025 @CarExamer 0 View 0 Comments

The Mercedes-Benz GLC is a premium mid-size SUV that combines luxury, comfort, and everyday versatility. Available in both SUV and coupe forms, with petrol, diesel, hybrid, and AMG variants, the GLC has become one of Mercedes’ most popular models. However, as with any modern vehicle, there are some known issues that buyers should be aware of. If you’re considering a GLC 220d, GLC 300, GLC 43, GLC 63 AMG, or a plug-in hybrid version, this guide outlines the most common Mercedes GLC problems, especially in the X253 (2015–2022) and X254 (2023–present) generations.

Book inspection

1. Transmission Jerks and Hesitation

The GLC is equipped with a 9G-Tronic automatic transmission, which is typically smooth but has shown signs of hesitation in certain conditions.

Common symptoms:

Jerky shifts at low speeds
Delay when accelerating
Harsh gear changes, especially when cold
Transmission warning messages

Check for recent software updates and ensure proper service intervals have been followed.

2. Suspension Noises and Wear

Some GLC owners have reported knocking or squeaking from the suspension, particularly in early X253 models.

Typical issues:

Worn bushings or sway bar links
Clunks over uneven roads
Degraded shock absorbers

A test drive over different road surfaces will help identify any suspension irregularities.

3. Infotainment System Glitches

The GLC features the older COMAND system in earlier models and the newer MBUX system in more recent versions. Both are feature-rich but not without faults.

Common problems:

Frozen or black screens
Audio system malfunctions
Bluetooth pairing difficulties
Navigation misrouting or lag

Most issues are resolved via software updates from a Mercedes dealership.

4. Electrical and Sensor Faults

Advanced safety features rely on a variety of sensors and control units, which may occasionally fail or give false warnings.

Reported issues:

Faulty parking sensors
Inconsistent lane-keeping assist or cruise control
Blind spot monitoring glitches
Battery drain in plug-in hybrid versions

A diagnostic scan can reveal stored error codes and help isolate the cause.

5. Diesel DPF (Particulate Filter) Problems

Owners of diesel variants like the GLC 220d may experience DPF clogging, especially if the car is driven mostly on short urban trips.

Warning signs:

Power loss or limp mode
High fuel consumption
DPF or check engine warning light

Longer motorway drives help maintain DPF health. Check if the DPF has ever been cleaned or replaced in used examples.

6. Interior Rattles and Trim Wear

Although the GLC interior is well-designed, some vehicles develop minor cabin noises or finish wear over time.

Examples include:

Rattles from dashboard or door panels
Worn buttons or touch surfaces
Loose seat trim or center console noises

While not critical, these can affect the premium feel expected from a Mercedes.

Final Thoughts: Is the Mercedes GLC Reliable?

Yes — the Mercedes GLC is generally a dependable and well-built SUV when properly maintained. Later models, especially from 2019 onward, have shown better reliability and tech improvements. Most issues are minor and can be resolved through regular maintenance and updates.

Before buying: