I polish mine with Autoglym resin polish and for the wax i use race glaze or Valentino. The shine you get is very nice and done properly water just slides off and beads really well
A bit awkward both parties are going to point the finger at someone else here. My only worry would be they do a crap job repairing it if they are tight for money etc and most days people don't like to put their cash into a rented property especially if they can't take it with them. I guess as well you don't want to **** them off as you do want them to take care of your house for the duration they are renting it.
My dad has a SLK 55 AMG and absolutely loves it and always gets top class service from our Mercedes dealer so I think it's just personal preference and obviously experience. The car has never thrown up a fault yet unfortunately it sounds like you've just had a bad time off it
I average around 26mpg to work and back etc but seen 40.5mpg up the motorway just gently cruising in sixth don't think il see that to often though...
I worked it out manually and was getting 32mpg but that was when I was bringing her home most motorway roads.
The smile my Zed puts on my face weighs out any poor mpg
It will be my first Z can't wait I'm a huge petrol head though so it wont be my first performance car, but my first RWD my other half has a drift car I think that has give me the bug