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  #1  
Old 12-28-2003, 06:47 AM
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Join Date: Jul 2002
Location: Northampton, England
Posts: 24
remote control transmitter

Once again I need some advice! I have a C180 Classic 1995 on which the remote control has just failed (and I do not have a spare). The car is presently parked on a neighbour's drive (we had a xmas party and I moved my car to allow others to park) but I am now unable to move it because the car alarm and immobiliser is in the on position and cannot be switched off. The light on the remote transmitter unit is not operating even with new batteries. I can open the doors with the manual key but cannot start the engine because of the immobiliser. As soon as possible I know that I need to order a new Transmitter unit from MB (unless there is another alternative) but is there some way by which I can bypass this problem and move my car. I recently had to replace the clutch master cylinder and noticed what I took to be the alarm unit in the driver's footwell. Would it be possible to bypass the immobiliser/alarm by rewiring? I realise that this information could be valuable to a car thief and so am happy for respondents to use my e-mail address: jewallace57@hotmail.com.....and hope that my previous posts may help vouch for my ownership of this car!)'.
Is there any other transmitter I could use? Another neighbour has two new MBs would it be worthwhile trying those transmitters (I realise that there would be a low probability of a a match but I am desperate to stop blocking my neighbour's drive).
I would also be grateful if someone could confirm that the transmitter is the problem if the light does not come on (I also checked the new batteries with my meter just in case!)
With thanks for any advice.
John
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  #2  
Old 12-28-2003, 04:21 PM
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Join Date: Jul 2002
Location: Northampton, England
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Apologies for being repetitive but I am desperate. I would be happy to completely bypass the central locking and alarm system if need be to start the car. How would an emergency breakdown service start the car? Would they have a 'generic' programmable infrared transmitter and would it be worth contacting them?
Thanks,
John
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  #3  
Old 12-28-2003, 04:58 PM
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Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Have you tried locking and unlocking the car with the key? Have you tried it from the passenger door?

I wish I could be more specific, but the security systems work different on the different models through those early years and I don't exactly remember. It is my impression that the key should turn off the security immobilizer, if not at the drivers door then at the pass lock or trunk.

The emergency road side service will arrange for a tow to a shop where real technicians work. Real technicians very seldom work on the road... easier to move the car than the shop!
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Continental Imports
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  #4  
Old 12-28-2003, 06:26 PM
P. S. Chana
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John,

I had a similar problem with my 1996 sl320 although your specific model may differ.

Remote would not work until I unlocked the car from the inside central locking switch. The This also de-activated the immobilizer.

As an alternative there is a separate key on the siren in the engine compartment which also de-activates the immobilizer.

The infrared remote keys are prone to stop working if dropped and replacement is expensive and need to be ordered from Germany.

Good luck.
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  #5  
Old 01-01-2004, 11:23 AM
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Join Date: Jul 2002
Location: Northampton, England
Posts: 24
Thank you both for your replies. In the end I have had to order another remote from Germany but there is a 7 to 10 day wait and the cost is likely to be 60. On a positive note, however, I opened up the old remote and found that the switch mechanism had become detached. I have resoldered the connections and this has meant that I have been able to switch the alarm off and hence use the car. I am not confident that the reconnection will be durable and so will be not using the alarm unitil the new remote arrives. I will then use the old remote as a back up. The lesson for me is that the PCB inside the remote looks extremely durable and so errors are much more likely to be due to a faulty connection between the swith mechanism and the PCB. So for others in a similar position I would recommend that they try to DIY the remote before discarding it.
Once again thanks for those that took the time to reply.
John
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  #6  
Old 01-01-2004, 05:45 PM
P. S. Chana
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Nice to see that you have a result.

It was interesting that the problem was with internal connections.

I assume that you have the switch blade key, how did you manage to open the casing of the key as it appears to be sealed?

Will try to repair my old one.

Thanks
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  #7  
Old 01-01-2004, 07:33 PM
P. S. Chana
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I took apart my old key as suggested by John. Using a flat screw driver and hammer I was able to open the joints of the key.

The micro switch had become detached from the board (see attached picture) small square piece in middle of picture.

I soldered the four tags on the switch to the board. The key started working.

The next thing to do is to synchronize the system as per the Owner's Manual.

I hope this will help others in an emergency as it is time consuming to order new key.

Parry
Attached Thumbnails
remote control transmitter-irkey2.jpg  

Last edited by P. S. Chana; 01-01-2004 at 07:52 PM.
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  #8  
Old 01-03-2004, 02:42 AM
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Join Date: Jul 2002
Location: Northampton, England
Posts: 24
Parry,
Well done. Apologies for not responding to the earlier message. I opened my fob using a Stanley knife to gradually break the seal and then cautiously prised it open with a screwdriver. It's good to have remote facilities again.
Regards and a happy new year,
John
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