Where are you located I can do it for half that price
If your not local try and use a bissel carpet cleaning machine or rent one (any dencent brand)
If its only light soiling then use something like Meguires fabric cleaner
Here is a excellent guide (half way down the page is the part about fabric seats)
http://autopia.org/forum/guide-detai...detailing.html
On this C class I used a bissel machine and a lot of elbow grease
I removed the covers and found the seats like this and the carpets were even worse
This is what it was like after a few days.........