Parked in a parking lot & placed it in park. Upon returning I started the car & placed it in drive. I took foot off brake & car moved rearward. Put car in neutral & car moved rearward. I tried all gears including park & car moved rearward, turned car off. Car would not restart because it was not in park. Because car was not in park all electrical accessories would not turn off & battery went dead, doors or windows would not open because all are operated electrically. Fortunately the battery died on route to dealership on tow truck. The shift cable was found to be broke. I looked on the web site Xlr net & this is not an uncommon problem and appears in several forums. If there had been a car behind me I certainly would have hit it. One guy on the forum parked his car put in park & when he turned back the car was rolling down a hill. Since there was little change in Xlr design over the years I would suspect all model years through 2009 are affected.a very unsafe condition! this should not have occurred on a low mileage well maintained vehicle.

- Winter Haven, FL, USA

The contact owns a 2004 Cadillac Xlr. While driving 5 mph, the vehicle accelerated on its own to approximately 55 mph. The contact attempted to engage the brakes, but was unsuccessful. On November 6, 2006, the contact's vehicle crashed into nine parked vehicles. All of the vehicles were damaged. There were no injuries. The vehicle was towed to the dealer and was in the repair shop from November 6, 2006 to February 23, 2007. The contact called onstar over 50 times due to the failure. The door locks have also failed and, on one occasion, the police had to let her out of her own vehicle. The contact is disabled and the failure is causing the onstar to fail. The dealer stated that the failure is related to the electrical system. The contact is aware of the safety risk and does not drive the vehicle every day. The failure mileage was 10,500 and current mileage was 11,000.

- Pinole , CA, USA