Mercedes-Benz 300 SE 1989 Owner's Manual page 78

It is imperative that the wheel m ount­
ing bolts be retightened after approx.
800 km (500 miles).
On new vehicles retightening is car­
ried out during the 1st inspection.
Retightening is also necessary when­
ever wheels are fitted, e.g. when the
spare wheel is used fo r the first time
or when a set of wheels with M + S
tires is installed.
Tightening torque: 110 Nm (80 Ib-ft).
For tire specifications, refer to
" Technical Data" .
Note:
The use of retread tires is not recom ­
mended. Retread tires may adversely
affect the handling characteristics
and safety of the vehicle.
76
Rotating wheels:
The wheels can be rotated according
to the degree of tire wear while retain­
ing the same direction of travel.
Rotating, however, should be carried
out before the characteristic tire wear
pattern (shoulder wear on fro n t
wheels and tread center wear on rear
wheels) becom es visible at a mileage
of 5000 - 10 000 km (3000 -
6000 miles) as otherwise the driving
properties deteriorate.
Underinflated tires due to a slow leak
(e.g. due to a nail in the tire) may
cause damage such as tread separa­
tion, bulging, etc. Regular tire pres­
sure checks (including the spare tire)
at intervals of no more than 14 days
are therefore essential. Keep in mind
that warm tires have a higher pres­
sure than cold tires. (See tire pres­
sure chart on fuel filler door and the
last page.) If a tire constantly loses
air, it should be inspected fo r dam­
age.
Use only genuine MERCEDES-BENZ
wheel bolts (identified by Mercedes
star).
Thoroughly clean the inner side of the
w heels any tim e you rotate the wheels
or wash vehicle underside.
Dented or bent rims cause tire pres­
sure loss and damage to the tire
beads. For this reason, check rims for
damage at regular intervals.
The rim flanges m ust be checked fo r
wear before a tire is mounted.
Remove burrs, if there are any.