Cleaning The Cooling System

CAUTION: Danger of scalding! Coolant can be very hot. Wear suitable protective equipment.

Repair the damaged component. Repair or replace the component which is causing the oil/coolant mixture.
Open rear luggage compartment. Protect the luggage compartment floor against soiling with a suitable cover.

Fig 1: Protecting Luggage Compartment Floor Against Soiling With A Cover
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Open tank cap on the expansion tank and remove.

Fig 2: Opening Coolant Expansion Tank Cap
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Remove the entire underbody cover.

Fig 3: Removing Underbody Cover
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Drain cooling system. Remove the drain plug from the engine, drain the coolant into a container and dispose of coolant according to the country-specific legal requirements.

Fig 4: Removing Coolant Drain Plug On Engine
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Pull the radiator supply and return lines off the engine. To do so, undo the hose clamps, carefully pull off the hoses and allow the remaining coolant to run out. Then connect the hoses again and tighten the hose clamps.

Fig 5: Removing Hose Clamp
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Tighten the drain plug on the engine. Tightening torque: 10 to 15 Nm (7.5 to 11 ft.lb).

Fig 6: Tightening Coolant Drain Plug On Engine
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