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Old 02-01-2013, 10:13 PM
GTBecker GTBecker is offline
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Location: Cape Coral
Join Date: Jul 2011
Posts: 54
Mein Auto: 2013 X3
The service manager here says this is normal, but couldn't explain why. I only see it on the right exhaust of my 2013 F25, and it wipes off very easily with a WD-40-soaked paper towel. Odd.
'97 528it, '99 X5, '03 X5, '04 528i, '05 X5, '05 330ci, '07 X5, '07 X3, '13 X3, '15 328xi
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