[dw215]

Hi Everyone,
Hopefully someone can help..
I have a 1999 C4,

One night last week, the battery in my key was dead so i had to manually unlock the doors...Everything was fine, car started, no problems, (put in a new battery in my key) ......The next morning the car was completely dead, no interior lights, nothing.....I jumped the car, car started...next morning dead again...
Yesterday morning i had a new Battery installed and alternator checked...everything was fine, used the car all day....Again this morning the car was completely dead.

Any suggestions on what this could be???
Please help

Thanks