It has been sitting for six month. The fuel pump was almost dead and I ripped out the wideband lambda to analyse the car of a friend. A storm put water through the tilted sunroof and I forgot to turn off the interior light after soaking up the water thus emptying the battery. Today I jacked it up, threw in a new fuel pump and the recharged battery. Turned on and off the ignition a couple of times to create fuel pressure in the empty lines (changing the pump got kinda messy). And what happened? The thing just started up and purred along. I LOVE these old mercs. I just had to add some fuel, air up the tires and it performed flawlessly on an extended test drive including a stretch of autobahn.