I must have some secret, hot-rod diesel mercedes produced. I don't think I have ever floored my '84 because it really has a lot of pickup. Even from a standing start I can easily pull away from traffic behind me. That said, my car is an '84 california version, and I suspect it has a different rear-end gear ratio than others. My car seems to rev higher than others on the highway.

If your car is really that slow, you should investigate. A major tuneup would probably really help - all new filters, a valve adjustment, a new wastegate hose, cleaning the banjo bolt and vacuum line, etc. On the other hand, if you don't know where the #5 cylinder is, maybe you should have a pro look at it.

GregS
'84 300D
'90 300CE