Hi everyone,

I am having problems with my key fob.
First of all, I saw the electrical pins of the batteries was bent, so I try to put both right... And then, obviously break it.

So, what I did was put some tin soldering where previously were the original pins, without touching the down side battery, just the upper battery and some wire to guarantee the connection with the batteries.

And now... I can open the car by putting into the keyfob the batteries. If I put batteries in the key fob, the car opens without pressing any button. Even if I press so many times the close button, sometimes the car get locked, but not every time, and the open button seems not to work (just quit and put again the batteries to open the car).

So... I think my remote is broken. I have to say, just a week before of breaking the pins, the key fob was having an erratic functioning sometimes.

i cannot see any light from the red plastic part as before, but if i press the locking button for 5-10 secs, I can see a big red blink from the key, so I understand there isnīt any wrong with the batteries, but with key fob.

This is how the remote is working.
And of course, i tried to make an key fob pairing by pressing twice and turning the key to on position.



Thank you!

 

I would get a new FOB and switch everything out. Don't loose the micro chip in the front by the key. There are videos on how to do this and FOB on Ebay. You can also order additional FOB from the Crossfire Swap Shop.

 

But can i get a key fob from another car changing the transponder to use the remote on my car with an unknown electronic?

I dont Know anything about Crossfire Swap Shop, i am from spain and key fob here are not listed anymore at the dealer, so i cant get a new one...

 

You can get another FOB from a Crossfire and change out the key blade, transponder chip and circuit board and it should work. You may have to resync the key to work the door locks. Be careful opening the cases so you don't damage the circuit board or micro chip. There are videos on U-tube.

 

Could it be a FOB from Mercedes? Like a R170 for example. Do I need my old circuit board or can I resync the old one?