Hatzenbach

I’m still chasing the root cause for the battery drain in my W221
And I just noticed that half of the time when I lock the car, the dashboard stays lit and the other half it turns off when I lock the car
it doesn’t make a difference if I use the remote or use keyless entry(exit)

any thoughts or ideas?

Sal_Monella

Battery drain and dash LCD's staying on?
I'd research the front SAM.
http://www.mercedesmedic.com/mercedes-sam-module/