HELP PLEASE!! - We have a stock 2007 M5 we got used with 23k from the dealer in January 2011 (new Michelin SportContacts from the dealer), and recently had the rear differential lubricant tech bulletin change due to slight rubbing noise with hard right turn when cold going downhill (within 600...

Hey M5 lovers! I bought a used E60 M5, MY 2005, about three months ago. It has only 52 000 km on the meter (32 000 miles) and the visual condition is very good and the service/checkups have been done by the book. I got a 6 month warranty on the car, which can become useful. I don't know yet...