c22o Immobiliser problem

[rdhenderson@dsl.pipex.com]

Hi, can anyone help with this:
Moved my 1996 C220 Equipe off the drive on Tuesday & parked it on the road. Returned half hour later to drive off & immobiliser wont switch off, therefore car won't start. The red light on the door handle is no longer showing when car is locked, red light on interior mirror is not showing anytime & the green light on interior mirror flashes constantly when ignition is switched on. Immobiliser remains active & engine wont start. The AA say it's a Mercedes dealer-only problem, my local auto electrician has suggested variour battery disconnecting solutions, none of which have been successful. The AA are scheduled to take the car to local Mercedes shop on Monday, I just wondered if there might be a quick & (relatively) easy answer.
Any help much appreciated, thanks in anticipation,

Robert
"Bluenoserab"

 

[television]

Hello and welcome.

Hard to say without know what alarm. here are two things to try
Disconnect battery for 10 sec, press the remote key up to 100 times to desynchronize the alarm.

To synchronize, point key at a receiver, press button momentarily, point window in remote at the receiver in mirror, press button twice, turn the key to ign 2 within the next 30 seconds
It might be this one

There are two knobs on the instrument panel. The knob on the left resets your odometer, this is the nob we are going to use, lets call it button 1. In addition, there are two positions when you insert the key nto the ignition. The second position lights up all of the instrument lights before turning on the car, this is the position we are going to use, lets call it position 2. 1. Turn key in steering lock to position (2) 2. Within 4 seconds press button (1) twice 3. The present status for distance is displayed. Within 10 seconds turn key in steering lock to position 0 (starting position without taking the key out) 4. Press and hold button (1), while turning key in steering lock to position 2 again. The present status for distance is displayed once more. Continue to hold button (1) 5. Release button (1) when you hear a beep. You have now reset it successfully.

The key must emit a IR beam seen in a digital camera

 

[rdhenderson@dsl.pipex.com]

Mercedes C220 immobiliser problem

Thanks for reply Malcolm, due to work , I've not yet had a go at your suggestion. The alarm is a Scorpio or Scorpion I think, or so I've been told. Don't know if that makes any difference to the solution but thought it might help. The key does emit an IR beam, but different to your photo in that mine looks like a red light. Does that matter? I'm hoping to have a go at it today, if I have no joy it's Mercedes dealer tomorrow & a big fat bill.I've also begun to wonder if simply a new car battery would do the trick. What do you think? Here's hoping & thanks for your help.

Robert

 

[television]

OK Scorpion not so easy, and info hard to get, it may be easier to take it out and use a different after market alarm, only has to join upt the cut colour coded wires I believe

 

[rdhenderson@dsl.pipex.com]

C220 immobiliser problem

Well, I've tried all the solutions mentioned so far, except swapping the alarm unit. Looks like a Merc workshop job (gulp!). Anybody think a new car battery might cure it?

 

[television]

No this would not help, if the headlamp are bright then the battery is OK.


On the last one of these faults the engineer found 3 very badly soldered joints on the alarm module, once re soldered all was fine