[urq] Speedometer Unit

[Max Hoepli]

I just changed a light bulb from the back of the speedometer on my 1986 Audi
5000 Quattro. There was a taped over bulb hole at the back, when I removed
the 8mm x 8mm piece of black tape and shined light from the back, the red
space has the letters "OXS". What does this mean? All bulbs are black based,
only the battery symbol has a white base bulb.
This taped over light bulb hole, on the bottom right, appears to be taped
originally from the factory, there are 9 bulb spaces altogether arranged in
a 3 x 3 array. The none-Quattro have these bulbs along the bottom of the
speedometer.


Max