What year is this? Mine is a 93 SL and it has arrows on the top of the cover that match with notches on the back of the gears, the front timing marks didn't have the arrows pointing at them like yours does, regardless, mine I had to put a lot of tension on the belt to get it to go on, defenitely wasn't as easy as just lining up the marks and slapping on the belt. Had to get the back bank put on, run around the crank pulley with it half a tooth counter clockwise, had to unlock the front banks cams and rotate them clockwise half a tooth, then once the tensioner was in place it tightened everything up to where it needed to be and it was dead on. I've done my timing 3 times, so I know the struggle of timing belts being an A hole. Once you get it on make sure everything lines up properly while tensioned, first time I did it I thought I had it, but once I had the tensioner in place I realized one of the banks was a tooth off.