Owner's Manual for the vehicle. With a quick reference ... - E38.org

128nBrake system
Brake fluid level
The warning lamp for the brake
hydraulic system comes on or
the message "Check Brake
Fluid" appears in the Check
Control:
The brake fluid level is too low in the
reservoir. Refer to page 147.
If the brake fluid level is too low and
brake pedal travel has become noticeably
longer, there may be a defect in
one of the brake system's hydraulic circuits.
The remaining circuit continues to provide
adequate brake-system performance.
Proceed to the nearest authorized
BMW center. Higher brake application
pressure may be necessary under
these conditions, and brake pedal
travel may be significantly longer.
Please remember to adapt your driving
style accordingly.<
The warning lamp also comes on with
the "Check Brake Pads" message in the
Check Control.
Brake pads
The message "Check Brake Pads" appears
in the Check Control:
The brake pads have reached their minimum
pad thickness. Proceed to the
nearest authorized BMW center as
soon as possible to have the pads replaced.
We recommend the use of original
BMW brake pads and components,
otherwise driving safety can be
impaired.<
Winter operation
The onset of winter is often accompanied
by rapid changes in weather. Adaptations
in driving style should be accompanied
by preparations on the
vehicle itself to ensure that your vehicle
operation through the winter remains
safe and trouble-free.
Coolant
Be sure that the coolant mixture is kept
at the year-round ratio of 50:50 (water
and antifreeze/corrosion protection).
This mixture provides protection
against freezing down to approx. –347
(–376). Replace the coolant every four
years.
Locks
BMW door lock deicer can be used to
free the locks if they are frozen. This
deicer also contains lubricant.
After using deicer, treatment with BMW
lock barrel grease is recommended.