I'm getting ready to replace the chain guides on my 1988 420SEL since it has 117K miles. While I'm in there, I plan to check the condition of the chain, but right now I just have the parts to do the chain guides and cam oilers. I have a question about the fuel lines... there are two fuel lines attached to the left side cam cover, and I can't get the cover off without removing the fuel lines. The rubber lines appear to be permanently fixed to the ends, which have flares. My question is, to remove the fuel lines, should I disconnect them at the flares? At the engine end?