1993 190e with 1987 motor and transmission. It shifts up fine until the final gear, at which point the RPMs rise like it is in neutral for maybe a second or two and then it engages the final gear. It is like you are leaving the throttle down on a stick shift as you change into the next gear. Again only when shifting into OD. If you leave it in 3rd it is fine but when you put it into D it does it as it changes into the final gear.

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1984 280E