Hi to all, I have a 1988 bmw 735i....very nice!! However I left the lights on overnight and the battery was dead....since then I have figured out how to change the car from german to english but I get three gong sounds after about an hour of driving and no message on the obc...what does this mean? How do I fix it? Please help!!

When you look at your OBC display...is there a "soundwave" icon to the far right of the "time of day" illuminated in the display? (see 1st pic below)

If yes, then you've activated the HOUR MEMO.

http://www.bimmerboard.com/members/q/original/E34%20OBC%20Hour%20Memo%20symbol.jpg

The HOUR MEMO is explained in your owners manual...see the text highlighted in the green rectangle in pic below:

http://www.bimmerboard.com/members/q/original/E34%20E32%20Hour%20Memo%20Instruc.jpg

Thank you thank you thank you!!!! I thought something was terribly wrong!! Do you know how to reset the obc once service has been done on the car?


Hi to all, I have a 1988 bmw 735i....very nice!! However I left the lights on overnight and the battery was dead....since then I have figured out how to change the car from german to english but I get three gong sounds after about an hour of driving and no message on the obc...what does this mean? How do I fix it? Please help!!

... Do you know how to reset the obc once service has been done on the car?

Check out my answer in this thread: http://forums.bimmerforums.com/forum/showpost.php?p=10072464&postcount=3 :)