Don't know, Haynes manual just says 'the procedure is very complex'.
However, for other engine types (earlier KE Jetronic systems fitted to M102/3 engines in E class) it says that after disconnecting the cable you prise off the ball joint and move the guide lever until the roller rests against the idle speed end stop. then adjust the length of the rod so it fits without any tension.
The difference with yours is that there are two rods in the linkage with a bell crank. If you don't get it right then the rate at which the throttle opens in relation to the tension in the transmission cable will be wrong and you won't get the right quality shift.
'08 Chrysler 300CRD (MB OM 642 engine)
'95 E220 estate
'89 230TE (R.I.P.)