2012 CLS 550 Benz
Hi. I have a CLS 550 Mercedes. It demonstrates
intermetent rough starts when cold. It appears the
rpms are lower than usual when the rough clunky
start occurs. I had a recent tune-up but that didn't
help. Any suggested are greatly appreciated. Thank
Are any lights lit up on the dash? Did the tuneup include a throttle body and Idle air control valve cleaning?
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