Can anyone tell me what the little "aerial diversity" socket on the back of BMW Business radios is for ? Is it really needed because aftermarket radios don't have it !
Doesn't it also carry the RF signal from the antenna preamplifier?
I would have thought the signal would go into the aerial socket - but it is possible for the supply and the aerial to be on the same plug. Will pull the radio out and check when it eventually stops raining here in the UK!!!