power failure

Hello I would be grateful if someone could suggest possible causes for UHI Power issue. My UK spec 2005 W203 C220 CDI Estate was factory fitted with the UHI Telephone prewiring option, an Audio 20 radio and a Nokia 6230i cradle adapter in the armrest. Recently I unwittingly connected a...

I have an automatic car (ML270) and when driving my engine will cut out, power steering fails and the indicators no longer work. No lights light up on the dashboard. I can press the button for the warning lights to come on and that works. I can put the car into park and restart the engine...