Mercedes-Benz 420 SEL 1988, Owner'S Manual

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12. Install spare wheel on wheel hub.
Insert wheel bolts and tighten
them slightly.
To avoid paint damage, place
wheel flat against hub and hold it
there while installing first wheel
bolt.Unscrew the alignment stud
to install the last wheel bolt.
13. Lower car, remove jack.
14. Engage jack tube cover hooks on
top and snap bottom into place.
15. Tighten the five bolts evenly, al­
ways skipping one, until all bolts
are tight. Observe a tightening
torque of 110 Nm (80 Ib-ft).
16. Correct tire pressure.
Important!
Retighten wheel mounting bolts after
approx. 800 km (500 miles). Observe
a tightening torque of 110 Nm
(80 Ib-ft).
Tire Inflation Pressure
A table (see fuel filler flap or last page)
lists the tire inflation pressures
specified for summer and winter tires
as well as for the varying operating
conditions.
Important!
Tire pressure differs by approx.
0.1 bar (1.5 psi) per 10° C (18° F) of air
temperature change. Keep this in
mind when checking tire pressure
inside a garage - especially in the
winter.
Example:
If garage temperature =
approx. + 20° C (+ 68° F) and,
ambient temperature =
approx. 0° C (+ 32° F) then the
adjusted air pressure = specified
air pressure + 0.2 bar (3 psi).
Tire pressures listed for light loads are
minimum values offering high driving
comfort. Increased inflation pressures
for heavy loads produce favorable
handling characteristics with lighter
loads and are perfectly permissible.
The ride of the vehicle, however, will
become somewhat harder.
Tire temperature and pressure in­
crease with the vehicle speed. Tire
pressure should therefore only be
corrected on cold tires. Correct tire
pressure in warm tires only if pressure
has dropped below the pressure
listed in the table and the respective
operating conditions are taken into
consideration.
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