Hi, thanks for accepting me into this forum

A few weeks ago I bought myself a 2001 E53 X5 3.0d for cheap because it has some issues that need sorting. It works fine but maybe I can get an opinion on the issues.

Issue 1: ABS/Traction Control/Yellow Brake are all lighting up on the dash.
Can this be easily resetted or fixed ?

Issue 2: The camber on the rear wheels looks a little bit off. My mechanic said
that most likely the wishbone bushes are worn out. But my car has the
self level suspension and i dont know if he can mess it up in any way
by accident. It drives fine and no noises.

Issue 3: When fuel is down to last quarter I run a huge risk of running dry. It
happened twice - Now I make sure it is always above quarter full.

Maybe some of you guys know the answer to these issues

Thanks in advance