Hi fasth, all i can say is dont go through a main dealer try to find a Mercedes specialist to do the work as they will be cheaper... i am not that far from you on the Wirral and use one close to me plus they do all my serviceing...does yours pull slightly to the left, mine did quite badly but i have after market wheels on mine and had the wheels laser tracked this helped alot but it still pulls slightly to the left ..hope you sort it .