12
Description and roadside assistance
Guidelines for Breakdown Services (Subject to technical modifications)
i
Instrument panel
Reservoir pressure gauge for brake circuit 1 or 2
왘
Turn vehicle key in steering lock to drive position.
The brake circuit with the lowest reservoir pressure
is displayed automatically by the appropriate
indicator lamp
1
or
2
. The gauge
3
shows the
pressure in this brake circuit.
The necessary reservoir pressure for the service brake is 10 bar (constant pressure system).
The ancillary consumer circuit is filled only after brake circuits 1 and 2 have been filled.
The operational safety of the vehicle requires an adequate reservoir pressure in brake circuits 1 and 2 (10 bar)
and in the ancillary consumer circuit
(8.5 bar).
1
Brake circuit 1 indicator lamp
2
Brake circuit 2 indicator lamp
3
Reservoir pressure gauge for brake circuit
1 or 2
i
Vehicles with Plus onboard computer:
The reservoir pressure of both brake circuits can be shown in the display.
To do this, call up menu
Check Info > Reservoir Pressure
Risk of accident
G
Leaks in the compressed air brake system put the operational safety of the vehicle at risk. If the reservoir
pressure in the compressed air brake system is too low, it is not possible to brake the vehicle. This could
make you cause an accident with possible injury to yourself and others.
Do not set the vehicle in motion until the reservoir pressures have been reached and the STOP lamp has gone
out.
If the display shows
—
, do not start to move the vehicle or, if moving, stop it as quickly as possible taking
into account the traffic situation. In addition, the segments of the status indicator light up red and the STOP
lamp does not go out.
Have the brake system checked and repaired as quickly as possible at a qualified specialist workshop
possessing the required expertise and tools in order to perform the necessary work.
Mercedes-Benz recommends a Mercedes-Benz service center for this work. It is absolutely essential that all
safety-relevant work and all work on safety-relevant systems is performed by a qualified specialist workshop.