My 95 e320 wagon's check engine light came on a while ago... Around the same time my built-in phone system (Benz part above the rearview mirror) started going wacky and sending me random messages and the antena would go up and down randomly. There is no phone in the car, although it had a factory phone installed in the armrest compartment.

I remove the phone system fuse near the battery that stopped the messages and the antena problems, however the car stared idling poorly when coming to stop or decelerating to go around a corner. The idle smoothes out again after about 10 second, and then the car runs perfect again. It doesn't always do it.

I made the code reader as described in the forum and pulled the following codes;
Pin 4 code 10
Pin 8 code 4, 13
Pin 14 code 11

The wiring harness looks poor around the temp sensor. It probably has not been replaced.

I realize I should replace the harness first, but since the car actually runs great except for the 10 seconds of poor idle when I come to a stop, maybe someone can tell me what I am facing based on the codes....

One other thing; the cruise control used to work perfect but it now is sporadic, sometimes it works, sometimes it doesn't.

Thanks in advance

Looks like Harness is suspect ..

BUT...............

Take the old OVP out and see if it is the original..there was a part# change
[ ARCHIEVES has that info] and if so, change it regardless..
Then charge the battery right up to full state and retry the car..

If still persist..Wire harness is just about had it...that is the most likely, but your complaints do fit OVP/Low Voltage ...so I would do that first.

I am assuming you did not go and get a code with your tool from Pin #4 as you state, but rather, you used the Factory DM SW/LED that is there ..correct?

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A Dalton

Ok, I'll check the OVP tonight.

No, I used the homemade tool. This is the same code (10) I get when I use the built-in PB and LED.

I see ..
Well, we do not seem to be on the same page on this..

Can you tell me HOW did you use the tool to go to PIN # 4 when pin #4 is the LED ???
Is this some kind of magic or something .......... ???

Pin 2 is the built-in sw and PIN 4 is the built-in LED on that chassis.

Maybe you are mistaken and you went into pin #3 ????
I very much doubt you went into pin #4 b/c there is no socket for tool insertion at that pin................
Please clarify how this can be done........

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A Dalton

Yes, you are correct I used the built-in LED for what I called pin 4. I used the homemade tool for pins 8 and 14.
When I read your original response I assumed the 'Factory DM SW/LED' was a special diagnostic tool (which I suppose it is)....
Rereading I see you meant the push button / LED.

Hopefully that puts back on the same page.

Very good.

The reason this is of importance and stood right out is b/c Euro exports to certain countries do not have the N59 Emmisions Diagnostic Module set-up for Legal Emmissions Mandates...so, you can see why the correct info is important to us making a diagnosis..we only have the info you supply......... if you had an open #4 socket, then my very first diagnostic thought is you do NOT have a CE/N59 equipped 124 chassis... when , in fact, you do.................which puts us back on the same page.

Regardless , my diagnosis/steps , although not complete yet, is still the same. I would start with OVP part# verification...........

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A Dalton