i recently asked a question about what car to buy my girlfriend. She wants a 4X4 to do the school run in and stuff

I have found An audi Q7 (06) for 35000 pounds
A X3 for 30000 pounds and the ML for 40000

the budget is 35000 pounds

What should we get

Audi Q7
For: Cabin space, quality
Agains:t Disappointing lack of Audi character
Verdict: The best SUV - but probably not for long

BMW X3
For: Handling, new 3.0d option
Against: Ride, versatility, cabin quality
Verdict: Slower, clumsier 3-series Touring. Tsk, tsk

Mercedes-Benz ML
For: Miles better to drive, sit in
Against: No seven seat option
Verdict: Finally an M-class worth boasting about

You decide which one you want, but my advise is that to get the Volvo XC90 or the Landrover Discovery would be cheaper and better then the Audi Q7. But the Audi Q7 is the best among the three you had stated in your question

Well for starters you cant have the x3 coz ur gonna look like a right pleb when ppl ask u y u havent got the x5 so it's between the audi and merc.
the audi and merc both look good but the audi is massive at over 5 meters long but it is up to u .
Just do not get the X3