The bosch part number for the replacement seal kit, which fits both the 4-bar and 5-bar fuel pressure regulators is 1 287 010 001. I've torn the seal near the tip twice now when switching FPR's. Lets just say that getting this in the archives is as much for you as it is for me, haha.

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There is a second fuse on the back of the radio

*I am not a mechanic nor an expert in Audi repair/tuning. In no way are my posts meant to replace professional consultation.*