Car starts the electrics fail

[Scottbo]

Please help.. I had a new battery fitted to my E320 cdi (211) a few weeks ago as I was getting the visit workshop battery light. All has been well however last week I started the car and it was fine. I then stopped to fill up and when I started the car, non of my electrics worked (except the radio), this includes ,speedo, rev counter, indicators etc. I drove for about 5 miles then pulled over and I noticed that it hadnt even recorded the mileage on my mileometer. I turned the car off an waited a while and when I restarted everything worked. This has now happened at least 10 times this week and I dont know where to turn, soetime it cn tak eme 10 restarts to get everything working, simply put I either get everything working fine or, the engine starts but no electrics aside from the radio and lights work. I have replaced the batterys in he key incase it was not registering properly. Any suggestions>

 

[Rdublin]

Did you find the solution to this problem mate ? I have the same problem now I think. Sometimes my fob key doesn't work and sometimes it does but when it does I switch the ignition on and all electrics work but once car is started all electrics are gone clocks indicators etc ... Cheers

 

[Rdublin]

Or would anyone be able to help me ??

 

[MC68HC705X32]

Rdublin, Its more than likely the Key. What kind of condition is it in?

 

[WG M-B]

Do you have a warning indicating consumers switched off by any chance???

 

[didi w203]

I get that when I leave the car parked for about a week. It comes up in red in the display saying battery voltage low switch off consumables. Then airbag light will come back on, stereo will switch off by itself. I drive it for about an hour and all is well. Check alternator for charging.