Hello! yesterday I purchased my first car, a 2003 Audi A6. So far, I absolutely love it, but there are a couple faults I've been trying to fix to no avail.

1. A signal on my dashboard titled 'Service!' has appeared and it beeps when I put the car into drive. I followed some instructions from a YouTube video that shows you how to fix it, but it only partly worked. I was able to get it to now say service in 10,000 km but it still shows and beeps every time I turn the car on.

2. My drivers side mirror is fogged up and cloudy. The previous owner said it may be an electrical error with the heating of the mirror. Does anybody have any suggestions as to what the problem is and what I'll need to replace?

3. My rear view mirror seems to be tinted, about 3/4 of it has about the same effect as a tinted window (it obviously wasn't tinted but that is a good description of what it looks like). Do I just replace the mirror pane?

4. This is a very general question, but there are some stains around the interior of the car (not the leather, but the "fabricy" parts), what is a good cleaning product for getting those stains out?

Thank you very much,
Stone