Mercedes-Benz C-Class Fuel Pump: Specs, Fitment & Common Faults

A genuinely important finding: a low fuel pressure fault code can also be triggered by a separate recall covering leaking fuel rails and injectors, completely unrelated to the pump itself — worth checking your VIN before assuming the pump has failed.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: genuinely worth knowing: in-tank fuel pump assemblies for the C-Class often include the fuel level sender as one combined unit rather than a separate part — check whether you need the pump alone or the full assembly before ordering, since prices and part numbers differ significantly.

A Part That Fails at the Worst Possible Moments

Few component failures are as inconveniently timed as this one — it has a habit of stranding drivers mid-journey rather than giving a clean warning while the car is safely parked. Knowing the early signs buys valuable time to get it sorted before that happens.

Before you buy: fuel pump specifications vary by engine size and fuel type, and petrol/diesel versions are never interchangeable. Always confirm against your VIN before ordering.

What It Does

The fuel pump draws fuel from the tank and delivers it to the engine at the pressure required for proper combustion. Almost all modern versions sit inside the fuel tank itself, submerged in fuel, which is partly why access for replacement is more involved than the part's small size might suggest.

Mercedes-Benz C-Class Fuel Pump reference plate

A Genuinely Important Finding Worth Knowing Before Replacing This Pump

If a low fuel pressure fault code has appeared, this is genuinely important to know before assuming the fuel pump itself has failed: this exact fault code can also be triggered by a separate, confirmed recall covering leaking fuel rails and injectors, worth checking your specific VIN against the official recall register before replacing any parts, since this recall-related cause is completely unrelated to the pump itself. It's also genuinely worth checking for fuel contamination in the engine oil, which can indicate a deeper underlying issue, before committing to a pump replacement based on the fault code alone.

A genuinely useful finding worth knowing if this pump does need replacing: a worn cam follower, sometimes called a tappet, can specifically prevent the high-pressure fuel pump from maintaining the fuel rail pressure it needs to operate correctly. It's highly recommended to replace this component at the same time as the pump itself, since a worn cam follower left in place can quickly wear out a brand new pump too.

It's genuinely worth knowing that driving with this fault present is possible for a short distance, but the engine may stall unexpectedly or enter a reduced-power mode, which can be dangerous in traffic — worth minimising driving until the problem is properly diagnosed and fixed.

Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Fuel Pump Guide for symptoms to watch for (including the low-pressure vs high-pressure distinction on direct-injection engines), confirming fitment against your VIN, and OE suppliers worth knowing.

More Mercedes-Benz Fuel Pump

The same part, covered across other Mercedes-Benz models.