Nfinitecc

While changing my oil and air filters on my 2010 I noticed a leak on the rear passenger valve cover. I've done alot of engine repair in the past but as my first Benz, I've learned it's best to figure out the quirks before tackling any job. Anyone done this job? Any wierd mercedes tricks or roadblocks? It's dripping onto the exhaust so I'd like to change it soon. Thanks my friends.