I am rebuilding the engine of 2016 CLA250. I am surprised to learn that this engine does not have an apparent timing marks in reference to the camshaft and the head and in reference to sprockets (adjusters) with each other. There is no marks at all at the head. I wonder if any of our members has knowledge as how to time the cam with no marks, or if any have a timing marks schematics. The dealer is no help as well as startek website. There is no literature available and that leave us (DYI) stranded. I would appreciate any assistance. I am interested to know the position of the cylinder No 1 cam lobes (intake and exhaust) position when the engine is at the TDC position. Thank you.