My 2000 Audi has an indicator light that comes on if one of the stop lamps is not working. It would be nice if this was a standard feature in every car. Trying

My 2000 Audi has an indicator light that comes on if one of the stop lamps is not working. It would be nice if this was a standard feature in every car. Trying to determine whether the lights in the tail lamp cluster are all working without some assistance is difficult at best.