Instruction book Audi RS5 Version year 2014
 Audi RS 5   Service and care   Checking and topping up fluids  Cooling system
The MIN and MAX marks are located on a split-level platform inside the coolant expansion tank Fig. 1.
Park your vehicle on a level surface.
Switch off the ignition.
Wait for the engine to cool down.
Cover the cap on the expansion tank with a cloth, and carefully unscrew the cap anti-clockwise WARNING!.
Check the coolant level in the expansion tank: it should be between the MIN and MAX marks Fig. 2 -arrows- when the engine is cold. When the engine is warm, it may be slightly above the MAX mark.
Add coolant in the correct concentration (if necessary) Link. The coolant level must not be more than 1 mm above the MAX mark.
Screw the cap on again tightly afterwards.
Any loss of coolant normally indicates a leak in the cooling system. Drive to a qualified workshop without delay and have the cooling system checked. If there are no leaks in the system, a loss of coolant can only occur if the coolant boils and is forced out of the system as a result of overheating.
WARNING!
  • The cooling system is under pressure. Do not unscrew the cap on the expansion tank when the engine is hot: you could be scalded by escaping steam.
  • The coolant and coolant additive can be a health hazard. Store the coolant additive in the original container in a safe place out of reach of children – risk of poisoning.
  • When working in the engine compartment be aware that the radiator fan may start running suddenly, even if the ignition is switched off – risk of injury!

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