HI i have just done mine, 200tdi I changed the both together as one unit it is a lot more easy, but I did mine out side my garage, you have to lift the car high enough to clear the floor pan, I used ramps and a pair of steel wheel holders (ramps without the angle) and lowered the two, on a 2 ton trolley jack with a small cradle to support them, with a ratchet strap to stop it moving, my jack has a removable centre, so I bolted through the cradle.