How come you cant use the original jack that fits in the side hole where it should fit ,then do the brake change 1 side at a time with an old rim under there for a bit of a safety if the car should decide to slip down ,lol .
I would never lift my car under the diff even that i have seen some tyre guys do it on other cars ,they try'd it on mine but i told them not to do it ,the car has it's proper fitted lifting points in front under the doors ,there is a rubber under there just for that ,you should be able to see it if you look under the car ( underneat each door ,near the wheel arch ending ) if you not sure i will take some pictures for you of the where abouts they are .:thumbsup: