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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53979
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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e240 2001 wont turn over or start but all electrical systems working.

Customer Question

e240 2001 won't turn over or start but all electrical systems working. Got a failure message saying electrical failure before I switched of the engine this morning
Submitted: 5 years ago.
Category: Mercedes
Expert:  Marty replied 5 years ago.

eurotec :

Hi, does the key turn in the ignition?

JACUSTOMER-pl62y741- :

yes

eurotec :

Ok, and when you turn the key to start does the starter crank the motor?

JACUSTOMER-pl62y741- :

no

eurotec :

Are you able to move the shifter into neutral?

JACUSTOMER-pl62y741- :

no

eurotec :

Ok, did you try a jump start yet?

JACUSTOMER-pl62y741- :

no but battery seems to be charged

eurotec :

It would be a good idea to try that first but this sounds like a fault either with the K40 relay module, transmission module or ignition switch.

eurotec :

You are going to need to have some tests run to check power to the various systems.

eurotec :

The K40 relay module powers up most of the critical modules in the car.

JACUSTOMER-pl62y741- :

OK - FYI i spilt the smallest bit of coffee on the shifter area (less than 5 cc) this morning just before the failure message came on

eurotec :

Liquid in the shifter can certainly cause these symptoms as well. If the system does not recognize that the car is in park it could act this way.

eurotec :

A diagnostic scan with the Mercedes tester can check the status of the park position switch in the shifter.

JACUSTOMER-pl62y741- :

can I manually move the shifter in and out of park - is there a way to release the park

eurotec :

Yes you can, standby for the procedure

eurotec :

Full Size Image

JACUSTOMER-pl62y741- :

OK moved it back and forward but still won't turn

eurotec :

It was worth a try but I didn't think it would help.

JACUSTOMER-pl62y741- :

any further suggestions

eurotec :

At this point you need to get the systems scanned to see whats going on. One thing that you can try is checking the fuses in the K40 module.

eurotec :

The module is located in the passenger side module box under the hood.

JACUSTOMER-pl62y741- :

OK - this would be the driver side for me as its RHD

eurotec :

You will need to remove the cover on the box and you will see a module with fuses pushed into the top of it. Check all of those fuses and see if they are blown.

eurotec :

I think it is still the passenger side for you.

JACUSTOMER-pl62y741- :

All of them fuse box is on left hand side of car as I look at car from the front, right hand side as i am sitting in car. No fuse box on my passenger side

eurotec :

It's not a fuse box it's a covered compartment, usually 4 screws hold the cover on.

JACUSTOMER-pl62y741- :

how do i know if they are blown

eurotec :

You either need to use a test light to check for voltage across them or remove and inspect each one for a broken fuse filament.