if the valve body is replaced, there is no guarantee that it will be fixed, there is the possibility that they may have to do further adjustments on it . this is additional labor because then they will have to drain ATF and open it up again. the bowden cable adjustment is the most obvious adjustment since that is supposed to adjust part throttle shift points. just keep track of the adjustment & do it in slow increments...
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"