I am planning to do some work on the car, (replace speaker, adjust conv
top, replace microfilter), before which, everywhere I read, it seems
advisable to disconnect the battery.
After re-connecting the battery, a friend with another M3 said the
engine did not run very well, but got better after a good drive through
all gears, all speeds etc. has anyone had a similar experience? Sounds
like the engine management system does not like to be without power.
I have the original radio code card, inc. the serial number, so no
worries there. Other than the radio code, what other electrics need
attention after re-connecting the battery?