38 Tires, brakefluid, safetytest
level of ride comfort. Radial-ply tires
of the same make and tread pattern
must always be fitted to al 1 four wheels.
The condition of the tires and mainten-
ance of the specified tire pressure can
greatly affect both useful .tire life but also
road safety. At regular intervals, and
before starting a lengthy journey (but at
least once a week) have the tire pressures
checked. Tables showing the specified
pressures are given inside the back cover
of this handbook.
lnspect the tires frequently for signs of
damage, stones or other objects in the
treads, excessive or uneven wear and
minimum tread depth.
Although the law in many countries per-
mits tires to be used down to a minimum
tread depth as low as 1 mm, we recom-
mend renewing tires before the tread
depth falls below 3 mm (0.12 in). Failing
this, there is increased risk of aquaplan-
ing at high speeds and where a sheet of
water covers the road.
lf you are forced to drive over obstacles
such as kerbstones or potholes, do so
with great care and at low speed in order
to prevent damage to the tire carcass
which might remain Ìnvisible from the
Outside.
At high speeds, the load on the tires is
extremely high, Ìn particular during hot
weather and when the car is loaded to the
full weight limit. Note that increased tire
pressures are specified for these driving
conditions, and do not exceed maximum
permissible gross weights.
Brake fluid is a hygroscopic substance,
and thus absorbs moisture from the at-
mosphere over a period of time. In order
to maintain the brakes in a fully opera-
tional condition, the brake fluid must
always be changed at least once a year
by you r BMW servi ce station .
Add fluid up to the upper "MAX" mark.
Your BMW Service Station knows the
brake fluid grades approved by the facto-
ry.
Apart from routine twice-yearly inspec-
tìons, we recommend that the interven-
ing BMW Safety Tests also be carried
oul:. They will enhance the safety of your
BMW on the roads, and thus protect you
and the remaini ng occupants of the car.
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