Mercedes-Benz W140 automatic transmission shift point adjustment
400 SEL600 SEL600 SE400 S
How are the W140 automatic's shift points adjusted?
The shift points are affected by the adjustment of the throttle cable and the kickdown cable. In the engine bay next to the throttle body are two pointers that must point at each other. They are adjusted by tightening at the cable ends.
What is done before the adjustment?
First change the automatic transmission fluid and filter if there is no record of when they were last changed. Old fluid can make the shifts jerk. The adjustment is made only after this.
How can the firmness of the shifts be changed?
Shift softness is adjusted with the T-screw: loosening softens the shifts and tightening makes them firmer. Adjusting the cable moves the shift points, and the rowing in kickdown can disappear when the shift happens at higher revs.
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