Where is glow plugs relay in Audi a8 2.5 tdi?

In the Audi A8 2.5 TDI, the glow plug relay is typically located in the engine compartment, specifically in the fuse box. The fuse box is usually found on the driver's side near the battery. To identify the relay, consult the vehicle's manual for the exact location and diagram of the fuse box, as it can vary slightly depending on the model year.