If you are worried about scraping your wheels when reverse parking, dipping the passenger side mirror to see the curb is always a good option.
But to change the mirror from parking to driving all the time can be a bit of a pain. But luckily, in a Mercedes, there is a neat trick.
With the car in Reverse, select the passenger side mirror on the control panel, then adjust the mirror so you can see a bit of curb, a bit of wheel - or a bit of both.
Now, when you move into Drive, the mirror will return to where it was before, and every time you park the car, when the car is in Reverse, the mirror will automatically dip back to the exact position of where you had it.