[mokgongee]

Hi everyone, hope someone can help me. Got a 2006 CLK 350 with only 27000 KM. today try to start no sound. Check battery and it is fine and I replaced the battery any way and still the same problem. Try to hook up the scanner and it keep saying turn on the ignition and the key is in position 2 already. Is that mean the ignition switch is bad? When I try to start the vehicle, the engine doesn’t turn over and when the key is in position 2 my engine fan run super fast and loud. Anyone have experience with this kind of problem?? Thanks...

 

[greg79s]

Were there any symptoms before the car stopped running? On this one I would go to the mb shop and have them hook up the factory electronic diagnosis. They could pin down the exact problem.

 

[mokgongee]

this is the first time it happen. just wonder if it was the ignition switch?? all dealer will not look at it until next week sometime and i need the vehicle soon..

 

[greg79s]

Try your spare key.

 

[keyhole]

OK - just to get this straight - the car is not even cranking, right?

a) you open the door and the interior light comes on?
b) you put the key into the ignition switch position 0, what happens? Do you hear the steering lock withdraw?
c) If yes, you turn the key to pos 1 and see a couple of panel lights come on (seat belt & brake)
d) If yes, you turn the key to pos 2 and the remaining instrument panel check lights come on.

Now you turn the key to the START position, and then what?

You may need a helper, but you should hear: e) starter relay click. f) starter solenoid click.

Come back & tell us if all this happens.

 

[mokgongee]

every thing work up to when you turn key to pos 2 nothing happen other than the engine fan run very fast and loud. no clicking when you start the car no relay sound

 

[rudeney]

That sounds like a problem with the ECU. I'd start by checking fuses.

 

[mokgongee]

i checked all fuses and also tried all other keys still the same problem. wonder if only dealer can fix it or other garage can fix it.

 

[keyhole]

every thing work up to when you turn key to pos 2 nothing happen other than the engine fan run very fast and loud. no clicking when you start the car no relay sound

So the key is allowed to move to the START position. That means that the Drive Authorization System (DAS) is working OK. Also it eliminates the EIS & your remote key from the problem.

Maybe the Start relay is toast? Do you know where it is?

 

[mokgongee]

i will check the relay later. do you know where the ECU located? maybe there is a fuse inside the ECU??

 

[keyhole]

Mok - care to complete your profile with User CP? It's what we do here.

About your 'ECU'. MB call this the ME-SFI control unit (N3/10) There is no fuse there.

Fuses are in several places (see the W209 forum Stickies for details) and some are located near N3/10, on the front SAM with fuse & relay module (N10/1). See WIS drawing below.

You will find both of these units located in the Module Box, up near the bulkhead under a waterproof cover. Make sure that it IS waterproof.

The START relay is fused by fuse f53 (15A) which is on this fusebox. That should be checked also.

If the START relay & fuse f53 are good, you may have a bad starter motor. They don't last forever...

 

[mokgongee]

I checked all fuses in 3 locations and they all fine. But why when use the scanner to scan and it keep saying turn on the ignition although it is on already. Looks like it is not getting power to the ignition and when it is in position 2 the engine fan runs like a jet and loud.

 

[keyhole]

The engine electric fan will run as soon as relay N10/1 kR operates, producing circuit 87 (Engine power) with Ig switch in posn 3.

I don't think that the fan should run in posn 2 - but I could be wrong. So maybe the EIS is faulty after all....

 

[mokgongee]

thanks keyhold. what is the EIS? and the fan is not running in a normal speed. it is super fast like a jet sound.

 

[keyhole]

It is the Electronic Ignition Switch control module. (N73) It consists of the switch and the electronic box of tricks together. See WIS drawing below:

 

[rudeney]

The engine electric fan will run as soon as relay N10/1 kR operates, producing circuit 87 (Engine power) with Ig switch in posn 3.

I don't think that the fan should run in posn 2 - but I could be wrong. So maybe the EIS is faulty after all....

That's what I was thinking. I seem to recall someone here (or may MBWORLD) had the same problem and it was a defective ECU. Also, there was another thread with a starting problem that ended up being a blown fuse. I can't remember the situation or the fuse number, but it was engine electronics related.

 

[mokgongee]

What make me think it is the EIS is i can’t hook up the scanner. It keeps saying turn on the ignition but my key already in position 2. I checked all fuses and they all fine and i also tested the relay and it work too.

 

[rudeney]

Do you have another SmartKey for another car (MBZ or Chrysler)? If so, try it - if the ignition switch rotates with the wrong key, then yes, it's the EIS. If not, and it only responds to the proper key, then it's not the EIS because in that case DAS is working properly and it won't work if the EIS is defective.

 

[mokgongee]

I tried my W202 key and it doesn’t turn and the steering still lock. I am going to have it tow to the garage and have them look at. I will post the result and cost after i get them back.. Wish me luck.... and thanks all you guys

 

[mokgongee]

Finally got the answer from the shop and they said is the SAM unit and ME unit both units including labour is $4200.00 what a rip off .... this vehicle only have 27300KM and it need all this parts. All B/S....