Exhaust pipes blacken after 4 days of driving
Thread Starter
MBWorld Fanatic!
Joined: Dec 2007
Posts: 2,052
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From: PHX/PIE/OMA ---> Yes, all three
E55 then E63, now back to an E55
Exhaust pipes blacken after 4 days of driving
Had em all cleaned and polished up, gonna have to add this to the regular bi-weekly routine.....
Senior Member
Joined: Jan 2008
Posts: 325
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From: Sydney.
2003-E55 2011-C63 2016-C63S
I have found the same thing happening with mine. I thought mine might be running rich but maybe it’s just an unleaded thing. What octane are you using? I generally use 98 Optimax or 100 Shell Racing
Super Member
Joined: Oct 2007
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From: Minnesota
2005 E55
Member
Joined: Dec 2007
Posts: 196
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From: Northern VA
06 e55 wagon
The cars run crazy rich from the factory so this is going to happen. One solution is an ECU tune to lean it up a bit ... the side benefit to enleanment of course besides cleaning the tips less is more power 
Senior Member
Joined: Jan 2008
Posts: 325
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From: Sydney.
2003-E55 2011-C63 2016-C63S
Yes its a daily driver. I usually run 98 Optimax/Shell Helix. The highest octane rating in most garages in Australia is 98 however some garages are currently testing buyer demand for 100 octane. When I find a garage with 100 I fill her up.
