Mercedes C class 2011 2.1 diesel service and maintenance

Engine oil

Engine oil capacity: 7.2 litres (7.6 quarts)
Oil change interval is 10,000 km or one year, whichever comes first.
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30, 5W-40

Air filter

Replacement interval for the air filter is 10,000 km.
After prolonged driving in particularly dusty conditions, it is advisable to check the condition of the air filter earlier and replace it if the filter is visibly dirty.

Fuel filter

Mercedes C class 2.1 diesel fuel filter replacement interval: 30,000 km

Glow plugs

Glow plugs change interval is 90,000 km.

Timing chain

There is no manufacturer specified replacement interval for the engine timing chain on Mercedes C class 2011 2.1 diesel, expecting it to last until the engine is overhauled (approximately 220,000 km - 370,000 km).
Based on real life experience, the Mercedes C 250 2011 CDI BlueEFFICIENCY timing chain change interval is approximately 250,000 km as at this mileage it may become overstretched and require replacement, so it is recommended to check the condition of the chain periodically after this mileage is reached and replace the timing chain if it becomes excessively stretched or if unusual engine noises occur.

Serpentine (drive) belt

Mercedes C 250 2011 CDI BlueEFFICIENCY serpentine or alternator belt replacement interval is 90,000 km.

Engine coolant

Engine coolant (antifreeze) recommended replacement interval for Mercedes C class 2.1 diesel is 90,000 km or 5 years, whichever comes first.