The Plus 8 and I expect most S4 Aero based cars have a Bulb Failure Warning system built into the can-bus.
I discovered how it works yesterday when the N/S brake light filament failed.
1. The warning message takes over the little LCD Display in the Speedometer...and it cannot be cancelled!! It only goes away when the bulb is replaced.
2. The car uses the indicator on the same side as an auxiliary stop light: something no one had mentioned..
3. I didn't have a replacement bulb with me. Tools, indicator bulb and headlight bulb, but no Stop/Side!
So, carry a set of spare bulbs... including number plate warning bulbs, which are an odd small size, and a N0 2 cross head screwdriver!!
