Help needed! Myriad faults suddenly occurring for no apparent reason on my 2003 XC70: doors won't central lock on remote or with drivers door key (only locks drivers door); warning message for anti-lock brakes; warning message for traction control: climate control only works intermittently; ignition key wont withdraw from the barrel (have to use the spare key to lock drivers door having previously secured other doors from inside by hand) All this nonsense happened over a few days. Volvo dealer useless simply said replace all door modules and UEM at a cost of £,000's Any ideas?