Open/Close Mercedes C240 ​​(W203)

Good morning, I am new in this forum and thank you to help me.
I have a MB C240 ​​4matic of 2003 and the remote controls do not answer me correctly when trying to open/close the doors.
The battery and batteries are already changed to the controls.

This inconvenience is presented after the vehicle parked for more than one day
...
Or it will be that it has some other Bakcup battery and it is downloaded.

I will appreciate your comments
thanks