I have a sporadic problem with my 94 600sel. Sometimes the ASR light comes on and power is cut so the car seems to be running only on 6 cylinders, if I stop the car and turn off the ignition, on turning on the ignition again the problem is gone and everything seems to work OK. Problem happens at both low and high speeds and with the cruise control both on or off and seems to be occurring more frequently now (on average 3-4 times per 500 miles) does anyone know what the problem may be and how to fix?
TIA.