Quote:
Originally posted by DavidS
Then switch on the "use residual heater" button. (which takes heat from the liquid salt thermal reservoir in the cooling system and transfers it to the passenger compartment) and let it blow until the air is cold again. Let the car stand overnight. Then get both the service advisor and the technician to come listen when you start the engine and point out the problem.
It is important to cool the residual heater, otherwise it will warm up the engine quite fast on startup the day after.
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Excellent suggestion to make sure the engine is as cold as can be the next morning!