I've been watching some of the 2013 replays (re-live LOL!) on YouTube.

On the left side of the screen is the list of cars in the race. On the right side of the list it shows how many pit stops each car has made and that part of the display also turns yellow for some cars for some reason regardless of pit stops.

What does the yellow indicate?

Also what is the cost of a DTM car - about $350,000 USD or so?