I was driving one hot afternoon in Las Vegas Nevada. My e320 came to a stop at a light, then started to shake and misfire. I promptly performed a diagnostic readout, it read that cylinder one had a misfire.
I changed spark plugs and inspected wires were good. Problem and code persisted.
I redid plugs making sure gap was exact and used torque wrench to ensure they were 21 pounds per square inch. Problem and code remain. Any suggestions on what else I need to do?