Why does my C7 show “Electrical System: Malfunction”? A: The manual’s wiring diagrams reveal a common failure: the alternator control wire (LIN bus) corrodes at the plug near the oil filter housing.
Audi generally follows two main service regimes for the C7 platform: Audi A6 C7 Service Manual -
For anyone driving an A6 C7—whether it’s a 2.0 TFSI, a 3.0 TDI, or a high-performance S6—the is not just a book; it is the most important tool in your garage. Why does my C7 show “Electrical System: Malfunction”