Mercedes CLK200 Compressor (2004 model) Key Fob Failure to initiate ignition by turning right

[Uneripty]

Greetings to everyone,


I am experiencing an issue with my Mercedes CLK200; when I insert the fob into the ignition, it fails to recognise the fob, preventing me from starting the engine.
Yesterday, I opened the key and observed that one of the transistors was damaged and disconnected. I attempted to reattach it using tape and subsequently tested it in my car, but to no effect.
My inquiry pertains to whether the activation of the immobiliser would render a replacement key ineffective.
I disconnected the battery yesterday to perhaps reset the ECU, and I plan to attempt it again later this evening.
What is the most advisable course of action? Can I summon a locksmith to resolve the immobiliser issue and then cut a key for me? If so, could you recommend someone who will not overcharge me? The car is located in Hayes, London. AA proved ineffective, only inspecting the battery and confirming its functionality, thereafter arranging for the vehicle's recovery to my residence.
Your assistance would be greatly appreciated.

[Lemmand]

You require a new key; thereafter, it must be programmed. Do you not possess a spare?

[Uneripty]

Regrettably, I do not possess a spare key; may I summon a locksmith to create a new one?
It appears that the immobiliser has been triggered; will acquiring a new key resolve this issue?

[Anhartic]

Present your V5 and an identification document, such as a passport, at a main dealership to request a new key.
Anticipate an expense of approximately £300 for a replacement key.

[Anhartic]

The immobiliser will disengage when a functional key is inserted into the ignition lock.
A locksmith cannot create a new key without the capability to program it for your vehicle.
This implies the utilisation of Mercedes hardware, which I suspect a local locksmith may not possess.


This company can fabricate a new key; however, they are located in Birmingham. A house visit may be financially burdensome.
Contact them; they might be able to assist. If that fails, search for Mercedes' primary supplier locally on Google.

[Anhartic]

http://www.replacementmercedeskeys.co.uk/contact-us/

[Starat]

Additionally, allow 7 to 10 days for delivery.

[Uneripty]

If I report it to my insurance or RAC/AA, will they dispatch someone to resolve the issue?
I have acquired a replacement fob from eBay and am considering transferring the electronics from the old key to the new one, as the outer casing of the fob is slightly damaged.
Will this be effective?

[Starat]

Your insurance will not provide coverage for this, and a breakdown service cannot create a new key.

A compromised key fob is not the issue; you have previously recognised a damaged circuit board, which may be the root of the problem.


Due to its antiquated design, certain automotive locksmiths possess the capability to fabricate and program a key. Consider conducting a search or making a phone call.

The issue may potentially stem from a malfunctioning Electronic Ignition Switch, with the damaged component not being the root cause in this instance.

[Darthilli]

Several years ago, I encountered a similar issue; upon detaching the PCB from the fob, I observed that the IR sensor had partially detached from the board. I re-soldered it, and the problem was resolved. If your component is intact, you can consider enlisting someone skilled to perform the same repair.

Keys from authorised dealers are costly; I have replaced keys for my children's vehicles using mobile automotive locksmiths, but I have not done so with Mercedes keys.

[Uneripty]

[Uneripty]

This is precisely what occurred with the key upon opening it. I attempted to reattach it using tape, but the key remains unrecognised. Would soldering it back in place rectify the issue? I have bought a replacement outer key fob as indicated below.

[Darthilli]

The infrared sensor is not included in the ignition/immobiliser system.

[Darthilli]

The immobiliser circuit is distinctive. A "new" key fob will lack the immobiliser code.

[Uneripty]

What do you propose I should do?

[Darthilli]

Myself and others have already elucidated the actions available to you.