Check engine light on...
I am sorry for you. It really sucks when a car such as an A7 and its pricetag shovel brown-matter in your face.
Hope the MB dealer you're dealing with has as comfortable & luxurious lounge as the one we have in Houston. Btw, I also frequent MBWorld & Benzworld forums, both are very informative. I suspect you'll be posting over there once you get your CLS?
Cheers & good luck.
there are just too many damn sensors these days, many (like TPMS) were dictated to the industry by the government, and often the technology is not ready for prime time.
have them turn it off. it is highly unlikely you have a engine malfunction.
good luck




