Put some sticky tires on it. I have Donlop A2s on mine and can not get them to squeal. It has lots of body roll though. T-walgamuth has a 280E with slicks that he auto-x races and does fairly well. For the size, weight and era these cars handle quite well.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine