Mercedes CLK200 Compressor (2004) Key Fob Not turning right to start Ignition

[LJ1992]

Hello All,

I have a bit of a problem with my Mercedes CLK200 , when i insert the Fob into the igntion it doesnt reconisge the Fob so i cant start the engine.
I opened the key yesterday and noticed that one of the transistors was damaged and disconnected, I tried to use tape to put it together and then retried it in my car but no avail.
My question is it looks like the immobiliser has kicked in so if I was to get a replacement key made I am assuming this wouldn't do work?
I disconnected the battery yesterday to maybe clear the ECU and then i am aiming to try again later this evening.
What would be my best course of action, can I call a locksmith out and would then be able to sort out the immobiliser issue and then cut me a key straight after? and if so could you recommend someone that doesnt try and rip me off the car is in Hayes,London. AA are useless and only checked the battery and advise it was all good and just arranged recovery of the vehicle to my house address.
Your help would be very much appreciated.

 

[pcthrillrider2]

you need a new key then get it programmed, dont you have a spare?

 

[LJ1992]

unfortunately I don't have a spare, can I call out a locksmith to make me a new key?
It also looks like the immobiliser has been activated would getting a new key fix this?

 

[AMGeed]

As above, take your V5 and some ID like a passport to a main dealer and order a new key.
Be prepared for a bill of around £300 for a new key.

 

[AMGeed]

unfortunately I don't have a spare, can I call out a locksmith to make me a new key?
It also looks like the immobiliser has been activated would getting a new key fix this?

The immobiliser should release when a working key is put in the ignition lock.
A locksmith won't be able to make a new key unless he has the means to programme it to work in your car.
This means using Mercedes hardware which I doubt a local locksmith will have.

This company can make a new key, but they are in Birmingham. A home visit may be finacially prohibitive.
Give them a call, they may be able to help. Failing that, Google Mercedes key supplier locally.

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[DSM10000]

As above, take your V5 and some ID like a passport to a main dealer and order a new key.
Be prepared for a bill of around £300 for a new key.

Plus about 7 to 10 days to get it.

 

[LJ1992]

What about if I was to report it to my insurance or RAC/AA would they be able to send someone out to fix the issue?
I have ordered a replacement fob from ebay and I am thinking of taking out the electronics from the old key and fitting this into the new key as i noticed the outer case of the fob is slightly damaged?
Would this work?

 

[DSM10000]

What about if I was to report it to my insurance or RAC/AA would they be able to send someone out to fix the issue?
I have ordered a replacement fob from ebay and I am thinking of taking out the electronics from the old key and fitting this into the new key as i noticed the outer case of the fob is slightly damaged?
Would this work?

Your insurance will not cover this and a breakdown service will not be able to make a new key.

A damaged key fob isn't going to be the problem, you have already identified a damaged circuit board and that may be the problem.

As it is an old style key there are some vehicle locksmiths that can make and code a key. Try searching or calling some.

It could also be a failed Electronic Ignition Switch and the damaged component may not be the problem in this case.

 

[Railwayman]

I had this problem several years ago, on removing the pcb board from the fob i noted that the IR sensor had partly come away from the board, soldered it back on and all was well, if your component is undamaged you could try someone who's handy to do likewise.

Keys from main dealers are expensive, have replaced keys for my kids cars using mobile auto key smiths, never done it with merc keys thou.

 

[LJ1992]

I had this problem several years ago, on removing the pcb board from the fob i noted that the IR sensor had partly come away from the board, soldered it back on and all was well, if your component is undamaged you could try someone who's handy to do likewise.

Keys from main dealers are expensive, have replaced keys for my kids cars using mobile auto key smiths, never done it with merc keys thou.

 

[LJ1992]

this is exactly what has happened to the key when i opened it , i did try tape it back but the key is still not being recognized
if i was to solder this back on would this fix the key , i have ordered a replacement outer key fob as per below

 

[DSM10000]

I had this problem several years ago, on removing the pcb board from the fob i noted that the IR sensor had partly come away from the board, soldered it back on and all was well, if your component is undamaged you could try someone who's handy to do likewise.

Keys from main dealers are expensive, have replaced keys for my kids cars using mobile auto key smiths, never done it with merc keys thou.

The IR sensor is not part of the ignition /immobiliser system.

 

[DSM10000]

this is exactly what has happened to the key when i opened it , i did try tape it back but the key is still not being recognized

this is exactly what has happened to the key when i opened it , i did try tape it back but the key is still not being recognized
if i was to solder this back on would this fix the key , i have ordered a replacement outer key fob as per below

View attachment 171820

As said The immobiliser circuit is unique. A "new" key fob will NOT have the immobiliser code.

 

[LJ1992]

As said The immobiliser circuit is unique. A "new" key fob will NOT have the immobiliser code.

what would you recommend i should do?

 

[DSM10000]

what would you recommend i should do?

I and others have already explained what you can do.

 

[Railwayman]

The IR sensor is not part of the ignition /immobiliser system.

Well that may well be the case I have never given it much thought, but my key would not turn with it disconnected. There is an infrared sensor in the ignition hole for what purpose I don't know, if anyone knows please enlighten me.

Gary

 

[DSM10000]

Well that may well be the case I have never given it much thought, but my key would not turn with it disconnected. There is an infrared sensor in the ignition hole for what purpose I don't know, if anyone knows please enlighten me.

Gary

The locking /unlocking is by RF, there used to be an IR sensor on the door handle for global window opening and closing (which rarely worked.

The immobiliser circuit in the key works by being powered by an induction loop in the steering column that is energised when the key is inserted. That's why the ignition will work without the batteries in the fob having power.

 

[LJ1992]

so you are recommending I contact a locksmith to make a replacement key?

 

[DSM10000]

so you are recommending I contact a locksmith to make a replacement key?

I am recommending that you read the advice given and make up your own mind what you wish to do.

 

[AMGeed]

so you are recommending I contact a locksmith to make a replacement key?

See Post#4 and 5 and make your own mind up.