Often the outside air temperature display on my 2001 Audi S4 will drop and then slowly return to normal temperature. It used to drop by 5 degrees C but in the last week it has gone as low as -40.
The problem could be a simple problem with a sensor or it could e worn insulation somewhere inside an inaccessible wire bundle, or a dozen things I haven't thought of. I worry about asking the dealer to look at it because they could spend a thousand dollars of labor trying to track down a minor electrical fault.
Any advice?