I test drove 1984 300D with 240K miles showing. She cranked and idled for approx 15 minutes. The dealer alerted me of sluggish acceleration. This was an under statement. I got her on the road and she barely made second gear, so I floored it, engine rev'd higher, pedal to the metal produced maxed speed of 45MPH. Easying off the gas seemed to help shift gear. I ran out of road, brought her back and same thing. asked dealer if he had any ideal what was causing the problem? He says... Fuel filter or maybe the turbo is going/gone bad. Question... Does anyone think this is likely to be the problem or does anyone think it could be something else? He's asking $900. I'm concerned about the tranny and engine compression most of all. Body/interior look good - I want to purchase it... I need to hear back from the forum before I make him and offer. Thanks.