This repy is for Sean Ng. (from HK>?)
My car is a W210 1996 so bare this in mind as your car may have slight difference.
The tools I used was a phillips screw driver, torque srew driver, pliers, a bent piece of stiff metal tube.
There are photos of how to remove the seat covers back to the bare frame, To install the new covers the fitting is the exact reversal. And I have put a serperate post on what the seats look like with the new leather seat covers and door trim in place on...
http://www.benzworld.org/forums/w210...fter-swap.html
Cheers....A1EK