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Safety and Security
Driving safety systems
!
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
otherwise seriously damage the brake system
which is not covered by the Mercedes-Benz
Limited Warranty.
108
i
If the yellow ESP
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.
For more information, see the "Practical
hints" section ( page 436) and
( page 449).
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
may
4-ETS designed for off-road use is auto-
matically activated.
®
warning lamp v
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