SELF LEVELING COMPRESSOR STOPPED WORKING IN REAR OF CAR. SUSPENSION STAYED "ON" AND WASN'T ABLE TO SHUT DOWN THE LEVELING SYSTEM EVEN WHEN NOT DRIVING THE CAR. MELTED/BURNT THROUGH WIRE HARNESS BECAUSE SUSPENSION LEVELING SYSTEM STAYED ON. THIS IS A KNOWN PROBLEM WITH THE E61 BMW SERIES. DANGEROUS TO DRIVE AND THE AIR COMPRESSOR UNIT FOR SUSPENSION, WIRE HARNESS KIT, ETC. ALL HAD TO BE REPLACED IN ORDER FOR CAR TO BE SAFE AGAIN. UNLUCKILY WE WERE ON VACATION AND THE SELF LEVELING AIR COMPRESSOR SYSTEM FOR SUSPENSION IS QUITE IMPORTANT FOR DRIVING SAFETY. *TR