I noticed on my G that there are a few places where people with grubby hands have left their marks. Specifically, the head liner, door trim around the seat belt pulley, and sun shades have finger prints all over them. Anyone have recommendations for cleaning that type of material?

 

I would use 303 Cleaner & Spot Remover for cleaning the headliner.

http://www.detailedimage.com/303-M2/...t-Remover-P15/

 

For headliner I use woolite 1:6 or 1:10 and for vinyl and plastic 1:10 of APC

 

+1 on the woolite. I have also used aerosol shampoo for heavier stains. One the plastic I usually use a Absorber and Orange Cleaner.

 

Headliner Cleaning - http://forums.bimmerforums.com/forum...d.php?t=952991

Seat Belts:
Maintenance clean seat belts with a 5:1 Woolite® distilled water solution. For spot stains use a fabric cleaner (303 Cleaner & Spot Remover™)

1. Pull the belts from the retractor and gently close the door on the belt, clean and allow to air dry before opening the door and retracting the belt. Do not use bleach or strong detergents, or dye on the seat belts as this may severely weaken them and render them ineffective in a crash.
2. Once fabric is dry apply a fabric protection (303TM High Tech Fabric Guard)
3. While you are cleaning the belts, take the opportunity to closely inspect them for damage and security of attachment, ensure here are no cuts, tears or abrasions (you should always inspect for damage etc if they get caught by a closing door)

After a while the seat belt mechanism becomes slow and / or will not retract when released. This can be avoided by cleaning the upper anchor; as the seatbelt retracts it leaves behind a film of dirt, which builds up over time. But by taking a Q- tip and some Isopropyl alcohol (IPA) you can clean the seat belt anchor / retracting mechanism. Once clean add some Plexus Plastic Cleaner to provide lubrication.