KNOWN FAULT · Mercedes-Benz · Jeep

Chain, injectors and coolant leaks

Sources are not verified in real time and no entry confirms that your car is affected.

Engine / equipment: OM651 2.1/2.2 CDI (C 200/220/250 CDI, E 200/220/250, GLK, Vito, Sprinter)
Period mentioned: 2008 onwards
Symptoms: Chain rattle on a cold start; on early units, loud injector knocking; coolant loss from the plastic coolant manifold or the EGR cooler.
Possible cause described: Plastic chain guide and a hydraulic tensioner that loses pressure (the chain is at the rear). Early units used problematic piezo injectors that Mercedes replaced in a campaign.
Check for the garage: Listen to a cold start, check the dealer's injector campaign history and check the coolant level.
Cost cited in the source: Chain: approx. €1,500–3,000 (estimate)A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Anonymous answer, no personal data.

How much does it cost to repair this fault?

Chain: approx. €1,500–3,000 (estimate)

A rough figure from the original database, not an up-to-date quote.

How is it checked?

Listen to a cold start, check the dealer's injector campaign history and check the coolant level.

What are the symptoms?

Chain rattle on a cold start; on early units, loud injector knocking; coolant loss from the plastic coolant manifold or the EGR cooler.

Which cars and years does it affect?

Brands: Mercedes-Benz, Jeep
Engine / equipment: OM651 2.1/2.2 CDI (C 200/220/250 CDI, E 200/220/250, GLK, Vito, Sprinter)
Period mentioned: 2008 onwards

Find garages near you and, before you say yes, check whether the quote is reasonable.

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