Timing belt Mercedes C-Class W203 OM646 (2.2 CDI) — replacement interval and kits

Timing belt for Mercedes C-Class W203 OM646 (2.2 CDI, 2000–2007) — replacement interval, compatible kits from Gates / Continental / Dayco / SKF.

Engine Specifications

Timing Belt Intervallo di sostituzione

Replace at whichever comes first — mileage OR age.

Compatible Timing Belt Kits

Replacement Recommendations

1. Replace as a kit — always replace rollers and tensioner together with the belt.
2. Water pump — on the OM646, the water pump is driven by the timing belt: inspect and replace if needed.
3. Torque settings — follow factory torque specs. Timing marks must align precisely.
4. Don’t cut corners — Gates, Continental, Dayco are proven brands for the OM646.

Domande frequenti

When to replace the timing belt on Mercedes C-Class W203 OM646?

Every 120 000 km or 4 years — whichever comes first. Don’t delay: a broken belt typically causes major engine damage.

Should the water pump be replaced with the timing belt on OM646?

Inspect the pump. If mileage exceeds 80,000 km, replacing it together with the belt is recommended.

Which timing belt kit is best for OM646?

Gates and Continental are the top choices. For Mercedes OM646: Gates K015657XS, Continental CT1028K1.