Cls 55 amg running rich
I just bought a cls55amg with 37k miles. Car looks and runs great. It is white and every time I drive it even 5 miles the back bumper is covered in what looks like soot and oil drops. Any suggestions on what my be causing this or how to fix it. I think it is running rich but don't know
Thanks
GL nonetheless, scan for codes and pics will help.







