Removal of top engine cover on 2002 Mercedes-Benz C240

Is it simple to remove the cover on the engine in order to get to the spark plugs and other engine parts? if so where are the screws or bolts that fasten it to the engine?

Asked by for the 2002 Mercedes-Benz C240
It is held on by clamps. Just grasp the cover on both sides and gently lift up.