Hello to all w126 drivers. I have a problem myself I bought a 500se last year in the Turks,I wanted the man to change the chain and the two camshafts have made a noise,but then it came when you changed this it was still running unround man has determined that there is no more compresion in the 5-6 cylinders,DIE QUESTION???I wanted it to be overhauled but I was told that it was not possible because it was an aluminium block is true? THE 2 QUESTION?man has complete valves hydroscotches.Piston rings all renewed jetz have all compression between 14-16 only the 5cylinder which has no compression date is also the only of the several scratchers on the cylinder has the question ?kanman the unconcerned continue driving or what can man do ?