Blue smoke on start up - CLS320

[s3uly]

I've noticed a puff of blue smoke on start up on my CLS, it only last a few seconds, I'm thinking it's fuel in the tailpipes.

I'll contact the dealer tomorrow but was wondering if anybody had seen this on 320 diesel.

[IATM]

TBH The general rule is that if its thickish white smoke then its unburt diesel (this happens potentially from leaky injectors).

Blue smoke generally means you have a coolant leak thats burning off. Its probably an idea to take a video and post it up so more experienced people can view it however your best to take it to a mechanic as the smell of the fumes is a good indicator in what it might be.

Hope it helps.