Driving On Wet Roads; Hydroplaning; Checking Brake Lining Thickness - Mercedes-Benz GLA 250 2019 Operator's Manual

Driving tips
152
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the function-
ality of your brakes at regular intervals.
You can find a description of Brake Assist
(BAS) on ( page 61).
Y
Mercedes-Benz recommends that you only
have brake pads/linings installed on your vehi-
cle which have been approved for Mercedes-
Benz vehicles or which correspond to an
equivalent quality standard. Brake pads/
linings which have not been approved for
Mercedes-Benz vehicles or which are not of an
equivalent quality could affect your vehicle's
operating safety.
Mercedes-Benz recommends that you only use
brake fluid that has been specially approved
for your vehicle by Mercedes-Benz, or which
corresponds to an equivalent quality standard.
Brake fluid which has not been approved for
Mercedes-Benz vehicles or which is not of an
equivalent quality could affect your vehicle's
operating safety.

Checking brake lining thickness

You can measure the break pad/lining thick-
ness using a test gage. Color-coding (green or
red) on the test gage allows you to determine
whether the brake pad/lining thickness is still
sufficient. The test gage is in the vehicle docu-
ment wallet in the glove box.
Front wheel
Rear wheel
Bring the vehicle and wheels into a suitable
X
position so that you can attach test gage
A.
Secure the vehicle against rolling away
X
( page 145).
Y
Engage park position P.
X
Switch off the engine.
X
Place test gage A between the wheel's
X
spokes on brake pad/lining =.
Hold test gage A vertically on brake
X
disc : and slide measuring pin ; onto
brake disc :.
Check which color field ? the arrow on
X
measuring pin ; is pointing to.
Green: the brake pad/lining thickness is
sufficient.
Red: the brake pad/lining thickness is not
sufficient. Have the brake pads/lining
checked at a qualified specialist workshop.
To avoid an inaccurate measurement:
make sure you position the wheels suitably
R
do not put the measuring pin on a recess in
R
the brake disc

Driving on wet roads

Hydroplaning

If the road surface is wet, hydroplaning may
occur depending on water level, speed and tire
tread depth.