I helping my brother in law restore his 1991 MB CE300. Was smoking badly and misfiring. Changing the spark plugs, ignition wires and valve cover gaskets seem to have corrected those problems. Engine is no longer smoking under the hood, but there is still a little oil leak somewhere. I am really hoping that this isn't a leaking head gasket, but the leak is coming from the front of the engine. Will run a head gasket leak test next weekend. Is there a camshaft gasket or oil pump gasket up at the front of the engine that could be the problem? I've also heard about leaks coming from a "camshaft advance magnet". I don't have a clue, but know I don't have the skills to replace a head gasket in this thing. Thanks in advance for any thoughts you might have on this.