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Mercedes-Benz · Cooling

Map-controlled thermostat

An electrically heated thermostat that the engine management can force open early, to hold a higher running temperature at light load and drop it under load.

Also called electronic thermostat, map thermostat.

How you know it is this

  • A fault code naming thermostat or coolant temperature regulation
  • The engine running hotter or cooler than the map expects
  • A check-engine light with no driveability complaint

Worth knowing before you buy

  • It has an electrical connector. A plain mechanical thermostat will fit the hole and then put a permanent fault on the dash.
  • The heating element fails more often than the wax element, so it stops being controllable while still working as a basic thermostat.
  • Confirm which type your engine takes before ordering — the two look similar.

What we need to quote it. The engine code. 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 pumps, fans and thermostats

All cooling parts
Get in touch

Map-controlled thermostat 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)