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   Two Doors with or without tops
     EIS FAULTY W203
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Posted on: 2014/8/3 14:15
Just popping in
Joined: 2010/12/11
From: Kelana Jaya Selangor
Posts: 12
Benz Model: W203 Coupe
Hi all,

I have run through many forums on EIS here. No similar problem though, with some may sounds close but not closes enough. My W203 coupe, being diagnose of EIS problem by the mechanic. The symptoms are; sometime when I turn the key ON, nothing lights up, no clicks and eventually no cranks. After retry, everything back to normal and subsequent I can turn on the engine. To add more pain, sometime when slowly cruising at 10-15mph the engine suddenly turns off. I pulled over and if there is light up when turning the key ON, the engine back running. These incidents not happen all the time though. Based on the trend it happened at anytime or anywhere.

According to the mechanic, to fix EIS, it costs me RM4k and RM1.5k for the reprogramming. They have replaced the remote key battery and upon checking found it working fine. Concurrently I canít lock the car using the remote key.

Please shed some light on this, is there other alternative way to cut down the repairing cost or is recon/used EIS can fix all these problems because I have been informed that its not an easy job to locate the part as there are 5 different types of EIS code out there for this W203 model.
Posted on: 2014/8/5 16:05
Just can't stay away
Joined: 2009/4/28
Posts: 103
Benz Model: W203, W212
Hello, I come across the similar problem almost a year now. It was a frustrating moment for me. What I did is to change the ABS module. There are too many associated problems pertaining to bring the car back to normal. The gear shift lever is another culprit where signals were not transmitted properly to the ECU and the EIS unit. After some 3 weeks of trial and error it was diagnose that there is a short circuit of the wiring in the driver side and the whole bundle of wires were examined and cleared. I spent almost RM 6.5K and currently the car run well. Its not an easy task to rectify the whole problem. My advise is to get a competent mechanic who knows wiring and electrics very very well. Another need is to have the full working C Star program to totally have a proper read out and diagnosed the car properly. The EIS unit does not come with a warranty and please be very careful with it. Hope this give U some idea. TQ
Posted on: 2014/8/9 16:14
Just popping in
Joined: 2010/12/11
From: Kelana Jaya Selangor
Posts: 12
Benz Model: W203 Coupe
Great thanks, Cikput for the info based on your real carís experience.

Indeed, itís very annoying when nobody can give you a certain answer in solving a mystery. My car has been check in and out from one workshop to another. My experience with the previous workshops, they canít guarantee me anything and caused me reluctant to take the risk. As consequence, I have spent so much time and money on the diagnosing just to find the solution.

Upon checking with the C Star program, it didnít detect any faulty on the engine part except on the alarm system.
Now my car has been referred to a man known as an alarm specialist by one of the workshop. He is trying hard to fix the EIS on the trial and error approach basis. He did for me a new remote key but still no avail. Itís been a third time my car has been returned back to him since last week and he requires another 4-5 days more to run the comprehensive testing again.

So Iím guessing, probably the EIS faulty is solely based on his intuition. He claims if he requires me to change a brand new EIS, still no guarantee it will solves the problem though.

Only time will tell. I got no clue when this is going to over.

Posted on: 2014/8/25 18:46
Home away from home
Joined: 2011/4/24
From: Kajang
Posts: 314
Benz Model: W204 C250 CGI AMG
My humble suggestion....

Bring your car to merce specialist workshop (not like C&C or Hap Seng etc) who could listen to your story and understand/appreciate your concern on cost and time I know there are such workshop out there coz I sent my previous ride once to change the EIS. (electronic ignition switch). Instead of changing the complete set/unit (seketul) of the EIS , he managed to source the faulty part only and replace it. Alhamdulillah my problem solved.

You may have to leave the car maybe 1 day at least for him to check all the possible causes. (no choice)

Slow talk with the workshop that if after change still cannot resolve, then you wont pay the spare parts and ask them to put back the old one back. But tell them to quote you the price first for u to decide before proceed with replacement. Please confirm also whether he will charge the labour cost and how much..in case the repair is not successful. If u r okay. then go for it.

It is not easy either for the workshop to identify the problems. Honest workshop wont charge you the spare part cost if the problem still there.

I think U can search for my posting on my previous problem on EIS. In short.. I slot in the key..but cannot turn. Take out the key....slot in back then can turn and start the engine.Happened on and off. Furthermore , sometimes I cannot lock or unlock the door using button on the key.

Good luck bro

Posted on: 2014/8/25 18:56
Home away from home
Joined: 2011/4/24
From: Kajang
Posts: 314
Benz Model: W204 C250 CGI AMG
Posted on: 2014/8/31 3:37
Just popping in
Joined: 2010/12/11
From: Kelana Jaya Selangor
Posts: 12
Benz Model: W203 Coupe
Many thanks on your post, Mugenseiki.

Yes, I did run through your link previously and it sounds similar to my problem now which the remote key working on/off and over relying to the infra-red function only.

However, the mechanic managed to fix something on the EIS which I got no clue what was it and my car no longer having the start up problem when turning the key ON.

Concurrently, I don't experience anymore the sudden engine turn off whilst driving in these past 2 weeks.

Alhamdulillah, I would consider the problem is resolved now. As a precaution measure I'm no longer using the remote key to lock up my car. As per advised by the mechanic I have to use the mechanical key instead, going forward.

He said if this problem reoccurs, I have no other choice rather than getting the brand new EIS.

Bottom line, it costs me RM 650.00 from the initial quote of RM6,000. Fuhhh.... what a relief......

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