MilfordMercMan
New Member
- Joined
- Oct 26, 2015
- Messages
- 4
- Reaction score
- 0
- Location
- Hampshire, UK
- Your Mercedes
- E-Class W211 2006 Sport Edition Saloon
I have searched the forums for W211 and can't find this issue mentioned. I have a 56 plate W211 320cdi Sport Edition saloon with 55,000 miles on the clock and I do 60 miles a day commuting plus business miles - about 20,000 annual so it is regularly used and serviced.
Three or four times I have got a total electrical failure - key won't turn, no dash lights or any electrical system works including hazards, lights and everything else.
Local MB Indy has had the car on SMART (strangely named because clearly it ain't) and checked through the fault codes and can find nothing but suggests EIS or key problem. Keys have been tested and batteries replaced despite nothing wrong. Car drives perfectly for maybe two weeks then it'll fail again. Happened on way home tonight after I was stationary with engine off and only the radio on for 20 minutes.
Called Green Flag - 112 minute wait advised so started poking around in the boot battery area and lo - the boot lights came on, Car started, everything works which I assumed this was coincidence as first time this happened in Lidl car park it came on again without warning after 5 minutes with no fiddling.
Arrived home, failed again - all lights off stuck in Park and no electrical systems working. Dark by now so using a lead light I took carpet out of boot and again pressing the various fuses and connections - the boot light comes on again and everything works. Fails after 5 minutes....took everything out of boot again smacked battery hard on top with my hand - like magic the systems are working again.
Anyone know what on earth is happening here? Battery reads 12v across terminals at rest and starts first time. When the power comes back, all trips are re-set and it is as if the battery has been dis-connected and re-connected. All joints/connections and everything else looks like new - no corrosion, damp or obvious signs of anything really.
Any help towards starting to find the problem would be a real boost - in the meantime I will start writing the Autotrader advert - this car is really the most unreliable I have ever owned and almost certainly my last Mercedes. It's cheaper to pay my mother's BUPA care home fees than keep this car on the road.
Three or four times I have got a total electrical failure - key won't turn, no dash lights or any electrical system works including hazards, lights and everything else.
Local MB Indy has had the car on SMART (strangely named because clearly it ain't) and checked through the fault codes and can find nothing but suggests EIS or key problem. Keys have been tested and batteries replaced despite nothing wrong. Car drives perfectly for maybe two weeks then it'll fail again. Happened on way home tonight after I was stationary with engine off and only the radio on for 20 minutes.
Called Green Flag - 112 minute wait advised so started poking around in the boot battery area and lo - the boot lights came on, Car started, everything works which I assumed this was coincidence as first time this happened in Lidl car park it came on again without warning after 5 minutes with no fiddling.
Arrived home, failed again - all lights off stuck in Park and no electrical systems working. Dark by now so using a lead light I took carpet out of boot and again pressing the various fuses and connections - the boot light comes on again and everything works. Fails after 5 minutes....took everything out of boot again smacked battery hard on top with my hand - like magic the systems are working again.
Anyone know what on earth is happening here? Battery reads 12v across terminals at rest and starts first time. When the power comes back, all trips are re-set and it is as if the battery has been dis-connected and re-connected. All joints/connections and everything else looks like new - no corrosion, damp or obvious signs of anything really.
Any help towards starting to find the problem would be a real boost - in the meantime I will start writing the Autotrader advert - this car is really the most unreliable I have ever owned and almost certainly my last Mercedes. It's cheaper to pay my mother's BUPA care home fees than keep this car on the road.
