Hi, I have just bought a 1999 M5. On Sunday the DSC, ABS and Speedometer all stopped working when the car was started. I turned the car off twice, the first time straight away which had no effect, then about 15 mins later. That time when I restarted all was well. I had just washed the car and wheels and was wondering if I had damaged a sensor as all these functions may be wheel related. has anyone experienced this before?