Mercedes-Benz G-Class Glow Plugs Replacement Parts

Yes, glow plugs exist on the G-Class, but only on diesel-engined variants – they are a diesel-specific cold-start component and petrol G-Class models never had them. The G-Class has been sold in the UK with both petrol and diesel engines throughout its long production run (W460/W461/W463 generations from 1979 onwards), so whether your car has glow plugs at all depends entirely on its fuel type. Check your V5 logbook or run a VIN check to confirm your engine is diesel before searching for this part.

These two vehicles sit in different eras of the W463 generation – the W463 ran from 1989 right through to 2018, but the diesel engines changed significantly across that span, and 2012 and 2018 cars are very likely to carry different engine codes meaning different glow plug specifications. The single most reliable way to match this part is to compare engine codes from both vehicles, which you'll find on the V5 certificate or via a VIN check. Confirm the specific interchange with the breaker before buying, as glow plug thread size, voltage rating, and tip design can vary even between engines that look similar on paper.

The original W463 ran from 1989 to 2018 and received a significant facelift around 2012 that updated styling and infotainment, followed by an all-new second-generation W463 launched in 2018. Glow plugs are an engine-driven specification, not a facelift-driven one, so what matters is your engine code rather than which facelift your body represents. Confirm with the breaker that the engine code on their donor vehicle matches yours, and the facelift boundary itself is not the deciding factor.

The G350d is a diesel and will have glow plugs; the G500 and AMG G63 are petrol-engined variants and do not have glow plugs at all – so trim level here is really a proxy for engine type rather than a cosmetic distinction. If you have a diesel G-Class such as the G350d, fitment is governed by the engine code, not by any trim or equipment differences between variants. So among diesel variants with the same engine code, trim level does not affect glow plug fitment – confirm the engine code matches and the plugs will be the right ones.

A diesel G-Class has one glow plug per cylinder – a four-cylinder diesel engine will use four plugs, and a six-cylinder diesel will use six. The G-Class diesel lineup has included both four and six-cylinder units across its production history, so confirming your exact engine code also tells you how many plugs the breaker's donor car carries and how many you need. Always cross-reference the engine code and cylinder count with the breaker to make sure you're buying the right quantity and specification.

Engine code is the governing factor for glow plug compatibility, so if a Sprinter or other Mercedes diesel shares the exact same engine code as your G-Class, the glow plugs may well be interchangeable – this is a common way breakers source parts. However, confirm this directly with the breaker against both registration numbers and engine codes, as there can be ancillary differences or specification revisions within an engine family that aren't obvious from the code alone. A good breaker will cross-reference both vehicles before quoting you.