Other guides put a lot of emphasis onto arresting the flywheel with a special pin, which however - as I see it - can only be put into position, if you have the complete engine removed from the car. With the engine sitting in the car a pipe (probably a brake-line) and cables block access to that sensor, which needs to be removed to put the pin in. Thus: All bollocks! I marked all the chains and sprockets and even the crankshaft-position. That did the trick for me. Ote the first new guide mounted