VDO Display Discoloration
My guess would be to have someone demount it or yourself. Get some dielectric cleaner spray and something to clean the inside of the housing.
Be gentle and patient, but since youé not speaking of any malfunctions. That be my guess. Althoug you would have answer the question to yourself.
How anything got behind it.
Allright i dove a little deeper, and the lighter ringed modules seem to be the ones affected more by this. However this doesn’t look like the general delamination that shows black or dark spots. Because gauge faces don’t included the laminated piece he is showing in the middle.



