Question Answered: losing power while driving
June 02, 2011, 06:46 AM
Without proper diagnostics, the best educated guess I have would be a bad connection at the battery. There are multiple connections at the battery. There may be a bad power connection. The EPC light (Electronic Power Control), will illuminate if there is an interruption in power or ground. Depending on how intermitten the problem may be, it may take some extra diagnostics.
Question Answered: Will not start, lights and radio
May 02, 2011, 08:55 AM
When you say the engine does not start, what is the symptom exactly?
1. Does the engine crank(meaning; does it turn and does not start),
2. OR does it do nothing( does not turn at all)?
This is where the path of diagnosis can go in two different directions:
1. If it cranks and does not turn, then the problem is related with spark to the plugs, fuel to the cylinders, or poor compression. The fact that the problem is intermittent, this would eliminate poor compression—just about. If we have no fuel, and/or no spark, the cause could be related to just about anything; a faulty sensor/s, wiring, poor electrical connection, control modules, fuel pump…on and on. I am not saying it’s all these things. We will have to diagnose the problem.
2. If the engine does not crank at all, then this issue is related to a faulty battery, starter, no power to the starter….etc. and somewhere along these lines.
In any case a faulty battery can cause all sorts of issues on this vehicle. Including lighting and radio issues.
Having said that: The issue with your headlights could be a faulty control unit, and or sensor/s. The lighting module may even need a re-flash.
The issue with the radio, again could be; faulty control module, radio or even a re-flash.
Very important to realize that this vehicle is very sophisticated and full of electronic control modules, it really has a mind of its own. The shop/technician that works on it has to have the proper diagnostic equipment that has full capabilities and not an aftermarket diagnostics scanner. We have the O.E.M. Mercedes diagnostic equipment and the expertise to diagnose any problem with this vehicle.
If there are issues, the control modules store fault codes in memory. We will need to perform a scan on all the modules and see if there are any current and/or stored faults and go from there.
I hope this helps a little…
Question Answered: could it be a relay
May 02, 2011, 07:11 AM
Could be a relay. However, it is a different relay that powers the blower. Could be two different problems.
Question Answered: missing
May 02, 2011, 07:10 AM
Is the Check Engine light on? We would need to perform a scan to diagnose it further. It could be coils, injectors. Make sure you have the correct OEM plugs.
Question Answered: Head Light
May 02, 2011, 07:04 AM
Is this a handprint on the inside of the actual bulb or lense? We would be able to give you a more accurate answer if you would bring it by so that we could take a look at it. If your vehicle is a 2011, it should still be covered under warranty.
Question Answered: ar wont back up
May 02, 2011, 06:27 AM
Transmission related, start by check transmission fluid.
Question Answered: Heat/ac problem
May 02, 2011, 06:19 AM
Must be diagnosed for an electrical problem. Possibly an actuator.