Exhaust pipes blacken after 4 days of driving
02-21-2008, 01:40 PM
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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.....
02-21-2008, 05:42 PM
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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
02-21-2008, 06:03 PM
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2005 E55
02-21-2008, 06:16 PM
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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 
02-21-2008, 06:25 PM
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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.
02-21-2008, 07:03 PM
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06 E55 SOLD, 89 300 SE 375,000 miles
I would rather have them run a little rich to be on the safe side. Mine would always get black after 3-4 days cleaning them.
