ecohen2

I have a GLA45 which I really enjoy. I parked it in a garage for a month and the battery was completely dead, no doors, no lights etc.. Nothing was left on indside the car but I did have the MBrace valet parking alert on. Would that drain the battery completely or am I looking for something else?

Thanks,
Ed

bmwpowere36m3

High parasitic draw, TSBs attached that may apply. Just worked on a '18 GLA250 with similar issue. HERMES software was already updated, draw still persists. Requires dealer to install bus recorder to further diagnose why certain modules are waking up.

Some info here: https://mbworld.org/forums/e-class-w...ml#post8280351

California

Hmmm. same thing happening to my AMG GLA. If i don't start it every five days or so, it is dead

190Efan

If you're going to not drive a newer car for any length of time you need to hook it up to a battery maintainer in order to keep all of the modern electronics happy and not drain the battery. A battery charger/maintainer isn't that expensive and will help to avoid the dead battery aggravation now being experienced.