I mounted a trailer coupling on my Volvo V40 about a year ago. My property entrance is relatively high and steep. And the V40 has a relatively long overhang from the rear axle to the rear. That’s how it comes that, when it comes to load or with the trailer, the trailer coupling crashes over the ground in my driveway. I would like to put the car 3 to 4 cm higher in the back. How can it be done the easiest and cheapest way? My idea would be to simply mount an additional rubber ring over the rear axle spring. So of the original simply an additional one. However, I have no idea if this fits. And how does this affect the axle geometry?