What should the battery voltage be on a Mercedes Benz?
Check the battery before starting – it should be around 12.5v. During start it shouldn’t drop below 11v, and after start, it should be around 14v.
Why is the battery on my Mercedes Benz not working?
Hint: Starter Problem or Low Battery This may seem obvious, but an old battery is the root of many headaches and can cause all sorts of malfunctions on Mercedes-Benz cars. How old is the battery on your Mercedes-Benz?
Why is the OBDII scanner not working on my Mercedes Benz?
When I got home I took an OBDII scanner, the same one I have used several times in the past to read the codes, and the machine did not connect at all to the car, simply the OBDII scanner does not power up. When I move the key to the ignition position the CEL light comes on as it should and goes off when the engine starts.
Why is the ECU not working on my Mercedes Benz?
He specified that he just could not make a connection to the ECU at ALL; he took the time to explain that a lot of times when cars come to his shop the machine is not able to read the readiness portion for the cars to pass smog, something that can be fixed by driving the car around for several hours, but that was not the case with my car.
Check the battery before starting – it should be around 12.5v. During start it shouldn’t drop below 11v, and after start, it should be around 14v.
He specified that he just could not make a connection to the ECU at ALL; he took the time to explain that a lot of times when cars come to his shop the machine is not able to read the readiness portion for the cars to pass smog, something that can be fixed by driving the car around for several hours, but that was not the case with my car.
Where is the diagnostic port on a Mercedes Benz?
In case this ever happens to someone in this forum there is a fuse titled “Diagnostic Port”, for my particular model is bay number 62 (15 AMPS fuse). I knew where the fuse box is located in my car (engine bay) but I noticed there is no diagram for the fuse assignment.
When I got home I took an OBDII scanner, the same one I have used several times in the past to read the codes, and the machine did not connect at all to the car, simply the OBDII scanner does not power up. When I move the key to the ignition position the CEL light comes on as it should and goes off when the engine starts.