Just bought a 2002 ML55 AMG! Have a couple questions

Anyway, I love the truck so far, and it comes with the (from what I understand) rare SuperSprint catback exhaust also! I just put new Continental tires on it today in the OEM 285/50/18 tire size.....
I have a couple questions....
1)The rear view mirror is loose (so is the plastic base where it mounts to the windshield, whats a common fix for that?
2)My automatic headlight switch isn't working as it should. When I switch to "auto" the headlights do not come on. I have to set the switch to "on".
3)When I have the ignition OFF but the headlight switch on, the dash lights turn on... But when I turn the ignition ON with the headlight switch on, the dash lights turn off. What could that be?
4)The headlight washers are not working. When I press the button, I hear what sounds like a relay click behind the dash but I don't see them spraying, I'm not even sure they raise... I'll check to confirm if they raise or not.
Thanks!


