Mercedes-Benz 300 E 1990 Owner's Manual page 71

Brake Pad Wear Indicator Lamp
The brake pad wear indicator
lamp in the instrument cluster
comes on when the key in the
steering lock is turned to posi­
tion 2 and it goes out when the
engine is running. If the indicator
lamp lights up during braking, this
indicates that the front wheel
brake pads are worn.
Have the brake system checked at
your authorized MERCEDES-
BENZ dealer as soon as possible.
Brake Warning Lamp
The brake warning lamp will come
on if insufficient brake fluid is in
the reservoir (key in steering lock
position 2 and parking brake
released).
When the minimum mark on the
reservoir is reached, have the
brake system checked for brake
pad thickness and leaks.
To test the brake warning lamp,
turn key in steering lock to posi­
tion 2. The brake warning lamp
comes on, and should go out
when the engine is running.
Warning!
Driving with the brake warn­
ing lamp on can result in an
accident. Have your brake
system checked immediately
if the brake warning lamp
stays on. Don't add brake fluid
before checking the brake
system. Overfilling the brake
fluid reservoir can result in
spilling brake fluid on hot
engine parts and the brake
fluid catching fire. You can be
seriously burned.
ABS (Antilock Brake System)
The ABS prevents the wheels
from locking up above a vehicle
speed of approximately 3 km /h
(2 mph) independent of road
surface conditions. It is neces­
sary, however, that the vehicle
speed reaches at least 8 km /h
(5 mph) before commencing to
brake.
At the instant one of the wheels is
about to lock up, a slight pulsation
can be felt in the brake pedal,
indicating that the ABS is in the
regulating mode.
On slippery road surfaces, the
ABS will respond even with only a
slight brake pedal pressure. The
pulsating brake pedal can be an
indication of hazardous road
conditions, and it functions as a
reminder to take extra care while
driving.
The ABS warning lamp in the
instrument cluster comes on with
the key in steering lock position 2
and should go out with the engine
running.
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