Skip to content
Emergency

Before you buy a used Mercedes-Benz Clase X.

2017–2020 · Diesel · 2 engines

Taken only from Testigo's sourced sheets. Use it to question the seller and on the test drive: it does not confirm that any particular car is affected.

Mercedes-Benz Clase X, real photo of this generation
Vauxford · CC BY-SA 4.0 · Wikimedia Commons · Photo source

The essentials.

Typical faults by engine

The period and mileage are those mentioned by each sheet's sources. They are not a maintenance interval and do not predict that any particular car will fail.

All versions

Sheets the catalogue links to all 2 of its engines.

X 220 d / 250 d

Diesel

We have no faults specific to this engine, only those common to every version.

X 350 d (OM642)

Diesel

Which engine has the fewest documented faults?

Documented faults and recalls by engine for the Mercedes-Benz Clase X
EngineDocumented faults
X 220 d / 250 dDieselFewest documented1
X 350 d (OM642)Diesel2

According to the data we have, the engine with the fewest documented faults is the X 220 d / 250 d (Diesel).

We only count the sourced sheets we have. An engine with fewer is not guaranteed to be more reliable: it may have been studied less or sold in smaller numbers.

Official recalls: ask before you pay

We have no official recalls on record for this model. Our list is not complete: ask anyway, with the chassis number.

  1. Ask the seller for the chassis number (VIN): it has 17 characters, appears in the car's documents and can usually also be seen at the base of the windscreen.
  2. Ask an official Mercedes-Benz dealer, or the brand's official website if it lets you check by chassis number, whether each recall has been done or is still outstanding for that VIN.
  3. Manufacturer recalls are normally carried out free of charge by the official service network. If one is outstanding, ask for it to be done before you close the sale.

On the test drive: what to look and listen for

Taken from each sheet's symptoms and checks. You can tick off what you have already looked at: it is saved only in this browser.

0 of 2 checked

AdBlue / DPF / EGR

  • Look out for: AdBlue or emissions warnings with a start countdown; particulate filter warning; power loss or rough idle from a dirty EGR.

    Ask them to check: Read AdBlue and NOx sensor codes with Xentry, check the particulate filter regeneration history and how the car is used (short trips).

Oil leaks / injectors

  • Look out for: Oil pooling in the engine's V, burning oil smell, drips under the engine; or a hiss or chirp next to an injector with an exhaust smell.

    Ask them to check: Visual inspection of the engine's V and the base of the injectors.

Sources

Every fact on this page comes from these Testigo sheets and their original sources. Sources are not checked in real time.

More Mercedes-Benz buying guides

View the model pageAll buying guides