Hi Fabian, unless you are experienced at suspension work I recommend you take it to a good suspension shop (does not need to be a Mercedes mechanic). That bearing is not easy to change and may require some special tools. Kent
First off, I bought one of your diesel tunning guides off Ebay, best money I ever spent on the car!! I have read it cover to cover and there are few pages without a smudge print on it.
Recommend taking it to a good suspension shop