Cheap Mercedes-Benz ML Glow Plugs

Yes, but only on diesel-engined MLs – glow plugs are a diesel-only ignition aid and are not fitted to any petrol variant of the ML at all. The ML range was sold in the UK across three generations (W163 1998–2005, W164 2005–2011, W166 2012–2019) and each generation offered diesel engines, so there is a good chance your ML has them if it is a diesel. If your ML is a petrol (for example the ML350 petrol or ML500), it uses spark plugs instead and you should search for those rather than glow plugs.

Almost certainly not – the W163 (1998–2005) and W164 (2005–2011) are entirely different generations with different engine families, and the glow plugs follow the engine code rather than the model badge. Your best starting point is to find the engine code from your V5 or a VIN check and supply that to the breaker, so they can match the part to the correct engine rather than just the generation. Never assume glow plugs cross between generations without confirming against your registration.

No – trim level (Sport, SE, Avantgarde, AMG Line, and similar) has no effect on glow plug fitment whatsoever. Glow plugs are determined entirely by the engine fitted, so a W164 ML280 CDI Sport and an ML280 CDI Avantgarde take identical glow plugs if they share the same engine code. Give the breaker your engine code and they will identify the correct part regardless of which trim badge is on your car.

The W164 generation ran from 2005 to 2011, so both years fall within the same generation, which is a positive start. However, fitment depends on the engine code rather than the year alone, and there can be mid-production engine changes within a generation, so you should confirm against your registration with the breaker rather than assuming year-to-year compatibility. Supply your engine code from the V5 or a VIN check to give the breaker the best chance of finding the right match.

The W166 (2012–2019) and W164 (2005–2011) are separate generations and their diesel engines are from different families, so glow plugs from a W166 are very unlikely to fit a W164. The part is specific to the engine code, not the model name, so mixing generations without checking is a real risk. Always confirm against your exact registration and engine code with the breaker before purchasing.

Diesel engines typically have one glow plug per cylinder, so a four-cylinder ML diesel (such as the ML250 CDI in the W166) will need four glow plugs, while a six-cylinder diesel (such as the ML350 BlueTEC) will need six. When sourcing from a breaker, it is worth confirming the full set matches your engine code, as plugs from different engine variants may look similar but have different heat ratings or thread sizes. Your V5 engine code is the most reliable way to make sure you are getting the right specification.