2026-07-22 · 5 min read
Mercedes GLC Coupe Common Problems Malaysia — C253/C254
C253 GLC Coupe shares all M274 timing chain and 9G-Tronic judder issues with the GLC X253. Additional coupe-specific issues: panoramic roof seal leaks from the wider glass panel and limited boot access making spare tyre access harder.
Shared M274 Issues with GLC X253
- Timing chain stretch: cold-start rattle — kit replacement RM 2,500–4,000
- 9G-Tronic judder on slow creep — ATF degradation; change at 40,000 km
- Oil cooler adapter seal leak — oil drips onto transmission bell housing
Coupe-Specific Issues
- Panoramic roof seal leak — wider glass panel causes water ingress into headliner
- Limited boot opening — awkward spare tyre access; be aware of run-flat option