Da kann alles Moegliche passieren mit schwacher Batterie. In 2004 hat mir das mal ein Experte so erzaehlt in einem USA Forum, hier der Text:
Low voltage will set EML only if it drops below 11v for more than 90sec.
Low voltage will also cause problems with the IKHA (heater/ac), memory for seats/steering and transmission will go into limp mode.
Mismatched tires WILL set EML light if vehicle has traction since it reads all 4 wheel speed sensors and gets an "implausable" reading.
Just for clarification: I am a 20 year BMW Master with 3 PhD's from Germany in Engineering and I know these systems better than almost anyone. I did 12 years of R&D on these system for a manufactoror in Germany, so I am not some "Key Board" mechanic or read some crap on the internet.
Ronald Trochelmann, Performing Imports
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