Mercedes-Benz 500 SEC Operator's Manual page 100

5. Remove the protective cover from
the jack support tube opening by
inserting a screwdriver in the
opening and prying it out.
The tube openings are located
directly behind the front wheel
housings and in front of the rear
wheel housings.
6. Insert jack arm fully into the tube
hole up to the stop. Place jack on
firm ground. Position the jack so
that it is always vertical (plumb-
line) as seen from the side (see
arrow), even if the vehicle is parked
on an incline.
7. Jack up the vehicle until the
wheel is clear of the ground.
Never start engine while vehicle
is raised.
8. Unscrew wheel bolts completely.
Keep bolt threads protected from
dirt and sand.
While removing the last bolt, hold
wheel against hub to avoid paint
damage on rim.
9. Remove wheel.
10. Screw the alignment bolt (1)
supplied in the tool kit into the
upper-most threaded hole.
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