Car fob Single Button Keyfob Resync - Key from Alternate Car

[gerrado]

Good evening,

I have read many threads reference the key fobs and resynchronising the single button keyfob with the car. (Point at rear view....).

However,
One of the keys I have that was taped up, the button has actually fell off the board from the solder points. I am going to attempt to resolder this but......

In the meantime I have purchased a Key from Ebay with the board intact etc.
I have replaced the blade key in this and attempted to resync / "reprogram" the key fob to no avail.

I have heard that sometimes it can be tricky and just to persevere with the sync method and it will work.

Can someone please tell me if I am wasting my time? I was under the impression this would / has worked from reading forums.

To be clear. It is a key from ebay, from a alternate Mercedes but the fob should be the same part.

!996 C200 Mercedes

Any advice would be appreciated.

Cheers

 

[AMGeed]

You are wasting your time. A key from a different car cannot be reprogrammed to work in your car.

 

[Blobcat]

As per above, it won’t work.

Use the buttons and case from the eBay key to repair your key (use your board and internals)

 

[gerrado]

OK thanks, it was worth a gamble.
Just out of interest is it an expensive job for the reprogram if I have the key?
I am of course going to find someone with more nimble hands to attempt to solder the other key in the meantime.

Cheers!

 

[mioba]

Gerrardo, unfortunately as mentioned above.
Mercedes only I am afraid, due to the age of the car you will be lucky.

 

[gerrado]

OK mate, appreciate the reply.

Cheers!