First, get into pairing mode: ie ignition to position 1, then press talking head for approx 10 secs - once in pairing mode (you'll see the screen message change from ACTIVATE PHONE to PAIRING MODE) : when it does that, keep the head button pressed for another 10 secs or so, and the system will give a triple bleep which indicates that the Bluetooth memory has been completely cleared.
Then try pairing your phone again. It helps sometimes to clear your phone handset of all SMS. Remember that Bluetooth in 2002-ish was in its infancy, and the units can be a bit quirky and not entirely compatible with brand new handsets etc. I found it the easiest and most reliable to get a handset that was well-known to work really well with the X and transfer address book etc as well as SMS, and just leave that permanently in the car. Bought a Sony Ericsson k800i brand new old stock off ebay for £50, got a snap in adapter from Cotswold BMW by mail order and hey presto, pretty fault free. I've had one electroonic blip where the phone and the car were in "half-comms" mode, kind of attached but not really - and had to delete all bluetooth memory and re-pair. Its all a bit like working on an older PC
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just a lot more expensive!!!
The Bluetooth frustration can be a right pain, especially when cheap Parrot kits work so simply and well rather than all the fiddling about with the older X5s bluetooth modules. The other total faff is the parking sensors......you can buy a set of parking sensors for under £30 and have then installed for £50 on any other car than a BMW, and they work brilliantly for years - well they have on our SLK and ancient Range Rover - 6 years plus and still fine!! But a bit of moisture or dirt or, well, just nothing! and an X5s sensors play up......my prev X had "seasonal" sensor disorder (faulty in winter, perfect in summer!) now the 4.8 rear sensors have started messing about intermittantly, luckily its an AUC so will get it sorted along with other little things that need doing, without extra expense.
Most times, the Bluetooth issue is just a question of getting the timing of the presses correct, if you're unlucky the Bluetooth unit may be faulty or a wire trapped somewhere under the armrest. Keep trying!!!
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