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Originally Posted by nobby
Adjusting the box is the easy part...allan key and a wrench....loosen the locknut with the wrench, turn the screw with the allan key COUNTERCLOCKWISE in small increments. Too tight will shorten the life of the box.
Getting to the box on a 560 is another thing altogether. I have not done it but have heard of guys removing the exhaust manifold and various other parts to access. Maybe someone else can chime in here....
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On the 560SL, I was able to do this job by accessing the bolt and jamb nut through the exhaust manifold. using a hex bit socket attached to a 12" swivel extension and a 19mm crowsfoot wrench on a universal with a 12" extension. A swivel extension is an extension sold by Snap-On, and I'm sure others by now, that has a beveled male end allowing a socket to swivel just a few degrees.
To do this properly you should disconnect the pitman arm. remove the airbag if equipt and rotate the steearing column from full lock to lock slowly with an inch pound torque wrench on the bolt that holds the stearing wheel on. The required running torque for this is available on the 107 service CD under the PS gearbox overhaul section. Since the published running torque is for the gearbox removed from the car, add about 3 inch-pounds to compensate for the stearing column bearing drag. The published running torque is not just one number. It is actually a graph that has higher torque with the wheel near center. If you have higher torques at the ends then the box will have to be replaced.
Note This adjustment screw is the most abused screw in the industy.
John Roncallo