Hi All, My 280se Coupe has always been a garage queen. I use to start it once a month. The last time i started it, the gas was smelling bad and old and it started missing. Checked the ignition spark and found it good. Cylinder 5 had no power. Checked the fuel to that cylinder and found that no fuel was coming in from the Injection pump in that line. All fingers point towards the pump. I put new gas and ran the a bottle of fuel injector cleaner but no good. What could be the possible problems with the FI pump? If clogged or sticky? How can i fix it myself instead of expensive overhaul of the pump. Please help.