Hi Guys, I’m new to the forum, I recently had my valve cover gasket replaced at a so called Mercedes specialist but still have a oil leak from the valve cover the car hasn’t been right since I took it there, the car judders like mad when cold and I can hear the turbo spooling up which I couldn’t hear before the work was done. Anyway sorry for rambling to cut a long story short they want to charge me another £300 to do the same work twice as they believe that it’s the gasket at fault even though it was to OE standards and not there handy work!! Could any please tell me what torque settings the valve cover bolts are supposed to be tightened to so I can have what they have set them to measured so they can’t worm out of doing the work for free!!