108 safety and security – Mercedes-Benz GL-Class 2008 Owners Manual User Manual
Page 109
108
Safety and Security
Driving safety systems
For more information, see the “Practical
hints” section (
page 436) and
Off-road - 4-ETS
With the off-road driving program switched
on (
page 277), or with the transmission
in LOW RANGE* mode (
page 201), the
4-ETS designed for off-road use is auto-
matically activated.
!
Operational or performance test must only
be conducted on a two-axle dynamometer. If
such tests are necessary, contact an authorized
Mercedes-Benz Light Truck Center. You could
otherwise seriously damage the brake system or
the transfer case which is not covered by the
Mercedes-Benz Limited Warranty.
!
Because the ESP
®
operates automatically,
the engine and ignition must be shut off
(SmartKey in starter switch position 0 or 1 or
KEYLESS-GO* start/stop button in
position 0 or 1) when testing the parking brake
on a brake test dynamometer and such testing
should be no longer than 10 seconds.
Active braking action through the ESP
®
may
otherwise seriously damage the brake system
which is not covered by the Mercedes-Benz
Limited Warranty.
i
If the yellow ESP
®
warning lamp
v
comes on while driving, the 4-ETS is being
switched off temporarily to prevent overheating
of the drive wheel brakes. In addition, the
message
ESP Unavailable See Operator’s
Manual appears in the multifunction display.
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