As a matter of fact, my unit has an OVP relay

the dealer had just replaced a unit for another 1995 C280 who did has the same symptoms as mine. That car has not returned for a complaint for 3 weeks but I am not sure whether the OVP relay replacement did solve the problem.

Well, I hope this attempt will make a difference..

 

if yours got an OVP, then it's worth a try.

the part is relatively not expensive. you can use it for test purpose or simply replace them.

 

Thanks for the reply sleepwalker,

well the ovp replacement did not solve the trick, the damn problem happened again two days later after installation.

Now they are trying to replace a new wiring harness, that's the final solution.

The wiring harness is the CAN Bus controller right? This harness does the transfers of signals from the IFZ to the HFM right?

 

yes. the CAN BUS goes by wire.

but i still stick to the version where the problem only happens after the engine control unit was replaced.

 

Thank you for your reply sleepwalker,

Somehow I agree with you that it may not be necessasry to replace the existing wiring harness.

But it is still part of the process of elimination and I would not take the risk of applying this replacement.

I hope you agree that my case is a question of the DAS signals from the IFZ to the ECU being interrupted intermittently.

I guess i shall be requesting the dealer to release my car ASAP as this is getting nowhere and causing a big hole in my wallet.

*What are the symptoms of a failing wiring harness anyway?

 

Hey sleepwalker,

If a failing alternator that does not charge on a regular basis when all components (highlights, fog lights, stereo full blast & air con etc) are switched on, does it affect the transfer of signals from the IFZ to the ECU?

Refer to the attachment, have you seen this equipement before?

[IMG]local://upfiles/3076/36E59C445FA645B4BFB853E8B1B4C483.jpg[/IMG]

 

no, it will not affect not unless the voltage goes below 8 volts.
all systems are design to function between 8 and 14 volts.

if power is low, the car will stall which is a clear sign of low voltage.

i haven't seen that gadget before, but i gues it is for battery and charging test with the engine off and running.

 

Dear Sleepwalker,

Here’s a million dollar question for all MB Vehicles owners as of 1995!

Is it possible to replace the fitted interior rear view mirror (with the red & green lens) and bypass any infrared keys or features to operate your car?

What I mean is I want to lock, unlock and start the car the classic way, going to the doorknob and insert your key. Like most Japanese cars are…

I don’t even care if people ask why I am doing this!

I am in a deadly trance/ phobia of looking at the red & green lights flashing!

Can’t sleep, eat and work……

 

[sm=interesting.gif][sm=goodidea.gif]

let me think about that and study the system first and which is the best substitute.[sm=smiley14.gif]

[sm=smiley24.gif] it's never been done but there is possibilty.

i will answer that next week[sm=nxsmile.gif]

 

Any news sleepwalker?