Had the car serviced a few weeks ago and have been driving pretty tame since due to heavy traffic. Last week accelerated hard on 2 separate occasions and both times this was followed by a smell which is reminiscent of old hot radiator water. The smell went away after 10 minutes of normal driving, there was no increase in engine temp and no warning lights of any sort. Spoke to the dealer and they say there was no record of loose hoses etc at the service. Will take it in next week bit anyone experienced such a smell? I would think it has to be related to the turbos. I was wondering if the dealer had overfilled the radiator holding tank whether this could be a possible cause?
Any advice would be appreciated. Car has 52,000 kms on it and I have had it from new.

 

You'll need to have the coolant system pressure tested. Only way to find out where it is leaking. Testers are not terribly expensive and it's a good tool to have in your arsenal if you are a diy kind of person.

 

If you have a 550 coupe check the turbo coolant lines, they're known to fail on the side that plugs into the block. I think it usually happens on higher mileage cars, but worth a look I'm sure.

 

Had the car at the stealers today to find out why i have a radiator water smell when accelerating hard and the cause was "we are sorry but at service 4 weeks ago it looks like we have totally filled up the radiator and the expansion tank for some reason and that has caused an overflow with high revs. We have never had this before and do not understand how it happened." In their defence I must say they did pay for an uber to and from work and there was no charge for the rectification plus they washed and vacuumed the car. Life moves on.
Stay safe

 

My dealer routinely overfills engine oil. They say that their oil guns automatically dispense the proper amount for the specific engine; if that's true, then I can only assume that they do not completely drain the old oil first. I've gotten into the habit of checking the dipstick myself when they're done and then making them remove the excess oil.