Mercedes-Benz GLS Oil Cooler Replacement Parts

Yes, all GLS variants are fitted with an oil cooler — the GLS is a large, heavy SUV and all its engines, whether petrol or diesel, are turbocharged and carry significant thermal loads, making engine oil cooling a standard feature across the range. The exact design and mounting arrangement varies by engine, so the engine code is the key detail when sourcing a used unit from a breaker.

Almost certainly not without confirmation, because the X166 generation ran from 2016 to 2019 and the X167 generation launched in 2019 as a substantially redesigned vehicle with different engine families and cooling architectures. These are distinct generations with different engine codes, so cross-generation interchange is very unlikely — confirm against your registration with the breaker before ordering.

Yes, fuel type matters significantly — diesel and petrol variants use different oil cooler designs suited to their respective engines and cooling systems. Always supply your engine code (found on your V5 or via a VIN check) to the breaker, as this is the most reliable way to match the correct unit rather than relying on fuel type or badge alone.

Trim level does not affect oil cooler fitment — AMG Line and other trim grades are cosmetic and equipment packages rather than mechanical changes, so the oil cooler is determined entirely by engine code, not trim. Bear in mind that a used part from a different trim vehicle may look different externally due to ancillary brackets or finishing, so confirm physical compatibility with the breaker against your registration.

The 400d and 350d use different diesel engine variants and engine codes, so the oil coolers are not necessarily interchangeable even within the same generation. Supply your exact engine code to the breaker — it is printed on your V5 and is far more reliable than the badge when matching mechanical components like this.

The X166 GLS received a facelift in 2019 for its final model year, and while many mechanical components remained consistent through the generation, ancillary mounting and cooling system details can change at facelift points. We'd recommend confirming this crossing of the facelift boundary directly with the breaker against your specific registration rather than assuming compatibility.