E39 (1997 - 2003)
I got the Engine Codes 1C and 1D: Mixture Control, idle, cyl#1-4 and 5-8 before.
After I replaced MAF sensor and all four O2 sensors (2 precat and 2 post cat sensors), fault code 1C was gone so far. But I still have fault code 1D Mixture Control, idle, cyl#5-8.
It looks like there is...