Hey guys, in my 500E, i've noticed when i slam on the peddle which hits the kickdown button, smoke puffs out of my exhaust, a good amount of it. Is there a way to clean it out? It only happens when i hit the kickdown button, but...don't like it!

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Own:
2013 C300 4matic
2009 C300 4matic

Owned:
2001 E320 Sport
1992 500E
1989 300SEL