Keyfob

[welshspike]

Please help. I have a 1994/5 c180 elegance. I have just changed the batteries in the key fob ,however I cannot get into the car now because the red light in the fob is not lighting up thus i`m not able to open the doors or start the engine because the immobiliser is still on. I have three spare keys but none are working. Somebody please help

 

[jberks]

Is the key not working or the car. You say the red light on the key isn't coming on - that's normally the button. Go to the DIY section and look at Anyweb's how to fix a key post.
On the other keys, they probably need a resync.

 

[television]

Have you put the batteries the wrong way up