I am looking at buying a 1992 SL 500. The owner says the car ran fine until the vehicle was raised to verify the frame's VIN. After lowering the car, it wouldn't run well enough to drive. The owners say they believe the Mercedes has a safety feature where upon an excessive tilt, the device kicks into action. This is news to me, has anyone heard of such a device and if so, what does it take to fix it?