1988 300 SEL Immoblizer problem (I think)

[Shamus1978]

Hello,

I recently removed my battery from my 1988 300 SEL on the advice of an automotive shop employee, as I was going away for 3 weeks. I now know that was a very stupid thing to do.

After re-attaching the battery, the electrics are working, the car will turn over (but not fire up up), and the hazard lights flash. I'm pretty sure this is a problem with the immobilizer.

Am I right in thinking that in the absence of a trickle feed, the immobilizer has reset or done something weird? If so, would anyone be able to suggest a work-around?

Thanks,
Shane

 

[television]

Have you tried a re sync if you can, do you use a remote key

 

[Shamus1978]

No, mine doesn't have remote locking/key, just a standard immoblizer fob for when starting the car.

I should add the batteries seem fine on both fobs, and light up as normal.

 

[television]

Do try the rest procedures in the DIY section, there are many different ways, that all that should be required

 

[Shamus1978]

Thank you very much for your reply.

I've done some digging and realised it was an after-market immobilizer, the Autowatch N4086, and am looking for a re-sync code for this model.

 

[television]

I have never heard of that one,, so something used in your country only perhaps, if the worst comes to the worst you can remove it.

 

[Shamus1978]

After digging around I got the 5 digit override code, and followed the directions to successfully override the immobliser, at least according to the manual, which I found here.

However, the car is still flashing her hazard lights and refuses to start. The engine is turning over perfectly, and everything was in good condition before I parked her for about 2 1/2 weeks.

Will keep trying on though.

 

[television]

I would remove the immobiliser and return it to as it was when it left the factory