I also saw the car today, the event was the AVD Oldtimer Gran Prix 2016 at the Nürburgring. I can recommend this event to everybody in and near Germany, the sound of the old DTM or DRM cars is absolutely stunning!
Car looked very filthy, the owner must have driven the car there once again. Lots of scratches on the front splitter and stone chips on the car, you can definitely see it's high amount of miles. I liked it...