I just purchased and installed brake light switch, middle light now comes on. Bas esp comes on still after reset. All lights have been replaced in the rear. All fuses replaced. Waiting on yellow fuse under hood driver's side to arrive for replacement. Just found a leak in rear differential now. Really don't want to dish out cash at mechanic. Found one who works on Mercedes, 200 a shop hour, my god. I drop it off next week. Hoping this fuse arrives and is the fox though. About to check relay connection at light switch, maybe wiring is loose. Any ideas from here? The 155 dollar inspection fee would cover a new part. SMH.