The 1980 & later 240D's use vacuum controls & have a vacuum modulator.
There are several plastic on/off vacuum switches on the valve cover that can & will affect those shifts..
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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