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Lion Yard Trading
Mercedes-Benz · Cooling

Transmission oil cooler

The cooler that keeps automatic gearbox fluid at temperature, either as a separate radiator or as a section inside the main radiator's end tank.

How you know it is this

  • A gearbox overheat warning, usually after towing or heavy traffic
  • Coolant that looks pink and milky — gearbox fluid has got into it
  • Harsh shifting when hot that is fine when cool

Worth knowing before you buy

  • WHERE THE COOLER IS INSIDE THE RADIATOR, an internal failure mixes coolant and gearbox fluid. Coolant in a gearbox destroys the clutch packs, and that is a gearbox rebuild rather than a radiator.
  • Pink milky coolant means stop driving. Every mile after that costs more.
  • A separate external cooler is cheaper to replace and easier to inspect.

What we need to quote it. The gearbox code, and whether the cooler is external or in the radiator. The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.

RadiatorExpansion tank and capUpper and lower hosesThermostat and housingWater pumpAuxiliary pumpFan and clutchShroud and mountsHeater matrix and valveHeater hosesPipes and flangesTemperature sensorAuxiliary coolers
Cooling circuit — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the heating and auxiliary coolers

All cooling parts
Get in touch

Transmission oil cooler for your Mercedes-Benz?

Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.

Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)