NEW GL450 issues

[MYMB]

My wife just received her brand new(55 miles on the odometer) GL450 and we have a few questions as new MB owners.

1. The auto close button doesn't engage enough when fully closed to turn off the interior lights. It does engage however when slightly lifted from the exterior. Is there a simple fix for this?

2. The low tire pressure light has come on a few times on my dash computer. I have aired the tires to the PSI indicated on the drivers door panel (well below the MAX PSI printed on the tire), but still got the error light. Also, how do you view the individual tire pressures from the dash computer? (I get stuck on: menu-R button???)

3. When going over the car to check everything out, I noticed that the rear wheel wells are made of fabric(?). They are plastic on the front. Is this normal? If so, why is this made this way? It seems that it would become disgusting, not to mention fall apart easily.

Much Thanks!
MYMB