Hi all

I have a 98 E-320. This morning my wife drove it so when she got home she'd adjust the seat position to 1 (my seat position). While she was holding the seat memory button, she'd turn off the engine. According to what she told me, the car interior lights, door lights all got shut off immediately so the seat position is still somewhere in between positition 1 and 2. She tried to crank the engine but only can hear a click.

I came home later and check the battery as it's 12.4v, there was not enough juice to start it. I tried jump start it, I also tried to recharge the battery with the other car for about 10 min. and then jump start again, still just a click.
I tried to check all the fuses (back seat, front seat, engine) for a blown starting/or electrical stablizing fuse but couldn't find one.

So what could be the problem here? Have anyone experience this before? Could it be the starter? What could be mess up as my wife was moving the seat and turn off the engine at the same time?

Thanks in advance
JeffreyP