Finally I got my new Audi Q7 last month (with 19-inch wheels, thank you for your suggestion). It has about 800km on the clock, and still in the running-in period (Audi suggests 1500km to be the break-in period).

Yesterday, I put about 120kg stuff in the trunk with two people inside the car, so the total load is about 300kg, driving distance is about 20km, on the flat road.

I am wondering if I put too much stuff (300kg) on my new car (especially during the break-in period)?