2026-07-22 · 5 min read
Mercedes GLC Coupe Carbon Cleaning Malaysia — M274/M254
GLC Coupe M274/M254 direct injection engines accumulate intake valve carbon at 60,000–80,000 km. Symptoms: rough idle, misfires, sluggish acceleration. Walnut shell blast cleaning RM 600–1,000.
GLC Coupe Carbon Cleaning
- Direct injection M274/M254 — carbon on intake valves at 60,000–80,000 km
- Symptoms: rough idle, misfires, sluggish acceleration
- Walnut blast cleaning: RM 600–1,000 for 4-cylinder