To make the car shift sooner you do adjust the control pressure (bowden) cable, you will need to allow several MM clearance at the throttle linkage. However to change the shift firmness you will need to adjust the vacuum modulator on the transmission.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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