BMW

I am new to this group...FAQ site?
I just purchased a used automatic 2000 323Ci w/96000 miles.
I flew down to south Florida from ohio and drove this car home with no
problems except......
Sometimes reverse will not work, but more often than not it works fine.
I can put the car in reverse and it does nothing. I can tell that the
selector changes something in the transmission, but it just acts like
its in neutral. I can drive away and try it again five minutes later and
it will work fine. The transmission does not act like it slips, even
when it won't back up. In fact otherwise it shifts very smooth like you
would expect.
(I don't know if this is related)
When I start the car, I can hear a buzzing... whaaaaa whaaaaa whaaaaa
whaaa whaaa whaa whaa whaa wha and then it goes away.

I have a degree and work on advanced current model cars for a living. I
mostly do electrical type work and actual diagnosis on Acuras and
Hondas. I have owned nothing but newer acuras for the last 10 years. My
ability to work on newer cars is extensive and I have a good
understanding of programming electronics as well as the mechanics.
However this is my first BMW and it will take me sometime to familiarize
myself with this car.

Any help would be greatly appreciated

Thanks, Josh

emails fine too