Cooling System Drain and Refill

CAUTION: When disposing of coolants, pay attention to statutory regulations or local waste water requirements regarding disposal of coolant agents.

DRAINING AND REFILLING
1. Raise hood to vertical position.

Lower Engine Cover:

2. Remove bottom engine compartment covering (505).

Radiator Expansion Tank:

3. Do not open the expansion tank or radiator cap unless the coolant temperature is below 90°C (194°F). To open expansion tank: First of all turn to 1st detent only to release the pressure, then turn on to 2nd detent and remove radiator cap.

Radiator Drain Plug:

4. Drain coolant at radiator. This is done by connecting a hose (inner diameter 12 mm) to the connection (arrow) and unscrewing drain plug (17). Drain coolant into a suitable vessel (approx. 4 L).

Draining Crankcase:

5. Drain coolant at crankcase. This is done by connecting a hose (arrow) (inner diameter 14 mm) to the drain plug and slackening the drain plug slightly. Drain coolant into a suitable vessel (approx. 4 L).
6. Tighten drain plugs for radiator and crankcase. Tightening torques: radiator 1.5 Nm (1 ft lb), crankcase 30 Nm (22 ft lbs).

Engine Vent/Bleeder:

7. Pour in coolant. Unscrew front screw plug (arrow) from the measuring sensor strip. Pour in coolant until it flows out at the tapped hole. Screw in plug and pour in remaining coolant.

Auxiliary Heater Bleeder:

8. If car fitted with auxiliary heater: Take off cap (635), slightly unscrew bleeder screw (636) until no more air flows out.

NOTE: Repeat operation several times.

9. Switch on heater and warm up engine until the thermostat opens. allowing this, top up coolant to the marking (arrow) on the expansion tank.

NOTE: Close filler connection on expansion tank as soon as coolant temperature has reached approx. 60 - 70°C (140 - 158°F).

10. Test cooling system for signs of leaks.