I only get it if I forget to let the car cool down after a hard drive. Usually keeping the revs down over the final mile or 2 is enough. If it's been a real hard run, I idle for a minute or 2 bedfore pulling into the garage. Don't know the cause though. Mitch Frey Portland, Oregon '91 200tq IA Stage 3 '00 A6 2.7T