Cooling System: Diagrams

Coolant Hose Connection Diagram





1 Expansion Tank

2 Non Return Valve

• Note the installed position.

• Arrow on the check valve points in direction of flow.

3 Non Return valve

• integrated in the coolant hose, not visible from the outside.

4 Heater Unit Heat Exchanger

• Replace coolant after replacing.

5 Engine Coolant Switch Off Valve (Heater) (N279 )

• Only on vehicles with optional equipment.

6 Coolant Thermostat Housing

7 Transmission Oil Cooler

8 Lower coolant hose

9 Upper Coolant Hose

10 Radiator

11 Oil Cooler

• For the engine oil.

12 After Run Coolant Pump (V51)

13 Cylinder Block

14 Coolant Pump

15 Cylinder Head

16 Auxiliary Heater

• only on vehicles with optional equipment.