I can't lock or unlock my car for some reason on my 2004 C2.

Anyone got an idea for me to try to get it working again? It still flashes it's red light but wont work???

Thanks

 

Have you not used the car for 5 days?

 

Yes but it stops working all the time like that and I just have to physically unlock the door with the key then it stats working - that doesn't work now

 

It goes to sleep after 5 days and that's normal.
Now you may have another problem
Do you have another key that the remote works?
You may have a bad circuit board and may need a new key.
Maybe $200 for a new one.Then the Dealer will have to re-program all the keys to the car.
Try changing battery in key first
Good Luck

 

Both keys stopped working

 

Will the car start?
Then try them again

 

Everything's fine with the car except the keys ...

 

The remote key fob has built-in obsolescence of eight to ten years from the factory. You need new ones. (IMHO)

 

Did you change the battery's in the remotes?
Simplest cheapest thing to do.