Mercedes-Benz GLS Coil Pack Replacement Parts

Only the petrol-engined GLS variants use coil packs — these are the spark-ignition engines such as the GLS 450 and GLS 580 (V8). The diesel GLS variants (GLS 350d, GLS 400d) use compression ignition and have no spark plugs or coil packs whatsoever, so if you have a diesel GLS this part simply does not exist on your vehicle. If you have a diesel and are chasing an ignition-related fault, confirm with your mechanic what component you actually need.

These sit in different generations — the first-generation GLS (X166) ran from 2016 to 2019, while the second-generation GLS (X167) launched for 2020 onwards, and the two are not the same platform. Even where the engine codes look similar across that boundary, ancillary fitment can differ, so you should confirm compatibility with the breaker against your exact registration and engine code rather than assuming year-range overlap makes them interchangeable. The engine code from your V5 or a VIN check is the most reliable detail to give the breaker.

Trim level makes no difference to coil pack fitment — AMG Line, AMG Line Premium, and standard GLS grades all share the same mechanical drivetrain components for a given engine. What matters is the engine code, not the badge or trim name, so a GLS 450 coil pack is the same part regardless of whether the car is specced as AMG Line or not. Always quote your engine code to the breaker to make sure you get the right unit for your specific engine variant.

The GLS and GLE share the same platform and, in many cases, the same petrol engine codes, which means coil packs can potentially cross over between the two models. However, whether a specific used unit from a GLE breaker actually matches your GLS depends on the engine codes being identical, so share both your registration and engine code with the breaker and ask them to verify before purchasing. Never assume badge similarity means the parts will interchange without that confirmation.

Within the first-generation GLS (X166, 2016–2019) there were running production changes, and it is worth being cautious about whether ancillary mounting or connector details changed at any point mid-run — this is something to confirm with the breaker against your registration rather than something that can be stated with certainty. The cleaner and more reliable boundary is the full generation change from X166 to X167 in 2020, where platform differences mean coil packs from the two generations should not be assumed to interchange. Give the breaker your engine code and build date and let them cross-reference their stock.

The GLS 450 uses an inline six-cylinder engine and has six coil packs — one per cylinder — while the GLS 580 uses a V8 and has eight. You do not have to buy a full set from a breaker; it is common to replace only the failed unit, though some mechanics recommend replacing adjacent ones at the same time if the car has high mileage. Confirm with the breaker how many coil packs their donor vehicle has available and whether they are selling them individually or as a set.