Coolant Line/Hose

Coolant Hose Connection Diagram





1 - Expansion tank
2 - Non-return valve
^ Note installation position
^ Arrow on the check valve points in direction of flow

3 - Non-return valve
^ Integrated in coolant hose, not visible from outside

4 - Heater unit heat exchanger
^ Replace coolant after replacing

5 - Engine Coolant (EC) switch-off valve (heater) N279
^ Only 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 engine oil

12 - After-run coolant pump V51
13 - Cylinder block
14 - Coolant pump
15 - Cylinder head
16 - Auxiliary heater
^ Only vehicles with optional equipment