2026-07-22 · 5 min read
Mercedes-Benz C-Class Spark Plug Replacement Malaysia — M271/M274/M254
M271 (W204) uses NGK BKR6EKPB iridium plugs (60,000 km); M274/M254 (W205/W206) use Bosch platinum plugs (60,000 km). Worn plugs cause misfires and rough idle — replacement guide and costs.
Spark plugs are a wear item that Malaysian C-Class owners often forget until symptoms appear. Replacing them on schedule maintains smooth idle, good fuel economy and prevents misfires that can damage the catalytic converter.
Plug specifications by engine
- W204 M271 (C200/C250): NGK ILKAR7C10G iridium or Bosch FR7KPP33X — 60,000 km interval
- W205/W206 M274/M254: Bosch YR6NE or equivalent iridium — 60,000 km interval
Symptoms of worn spark plugs
- Rough idle or vibration at traffic lights (especially after the engine warms up)
- Slight hesitation or stumble on acceleration from low speed
- Increased fuel consumption (typically 5–10% above normal)
- Check Engine light with misfire codes P030x
Replacement cost at 4M Car Care
A set of 4 iridium spark plugs for the C-Class 2.0T engine costs RM 200–350 for parts. Labour is RM 100–200. Total: RM 350–550. The M271 4-cylinder is straightforward to access; M274 and M254 are similar.