After parking my 280SE after a long trip, I started it a couples weeks later and the engine ran extremely rough with absolutely no power when shifted into gear. I thought it needed a tune up. I installed a new distrubutor cap, rotor and points. Now it won't start. It didn't appear to be getting any spark so I replaced the coil. No luck. After reseaching the workshop manuals, I checked the ignition parts for proper voltage and resistance. Everything seems to check out okay. The car appears to be getting fuel. You can really smell it after I crank the motor for about 30 seconds, trying to see if she'll at least cough. I wonder maybe if the timing chain may have jumped. Not sure. Would like to get some direction from anyone who may have experienced a smiliar problem.