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The driver is always responsible for choosing the
right speed and observing other road users. This
applies in particular to junctions, roundabouts
and traffic lights, as route-based speed adapta‐
tion does not brake the vehicle to a standstill.
PPC is intended for use on motorways and major
roads. Within towns and in heavy traffic, PPC
should not be used.
PPC
PPC uses topographic map data to optimise fuel
consumption and to adjust output according to
operating conditions.
PPC influences gear selection and adjusts the
speed of cruise control (
/
tance control assistant (
/
The following route events are taken into account
by PPC:
The speed adjustment facilitates better uti‐
R
lisation of momentum accumulated on down‐
hill gradients.
On uphill gradients, the power output is opti‐
R
mised and may be reduced before the top of
the hill is reached.
You can activate/deactivate PPC via the
menu and the Settings,
Assistance systems
items in the multimedia system.
PPC Interurban
PPC Interurban uses map data to react to route
events. By reducing power output in good time
prior to route events, coasting can be used to
save fuel.
The following route events are taken into account
by PPC Interurban:
the cruise control speed is set in advance by
R
PPC to suit the speed limit ahead. The driver
can subsequently adjust the cruise control
speed.
PPC Interurban uses data on bends, round‐
R
abouts, traffic signs and junction situations to
calculate a suitable speed.
You can activate/deactivate PPC Interurban via
the
Controls
menu and the Settings,
systems
menu items in the multimedia system.
PPC is active when the following conditions are
met:
PPC has been activated in the settings menu
R
cruise control or the distance control assis‐
R
tant is active
R
R
PPC is restricted in the following situations:
R
R
R
R
R
R
page 236) or the dis‐
The on-board computer shows the status of PPC
page 238).
by colour:
R
R
R
R
Controls
menu
System limits
Route-based speed adjustment does not take
right-of-way regulations into account in every sit‐
uation. The driver is responsible for complying
with road traffic regulations and driving at a suit‐
able speed.
In difficult conditions (e.g. unclear roads, lane
narrowing, wet road surfaces, snow or ice) or
when driving with a trailer, the speed adjustment
made by the system may not always be suitable.
In these situations the driver must intervene
accordingly.
If the gross vehicle weight is more than 80 t and
power take-offs are operated during the journey,
this can result in a malfunction of PPC in certain
situations. In this case, PPC must be deactivated.
Assistance
Driving mode 243
GPS reception is available
map data is available
the transmission is in the manual drive pro‐
gram
you depress the accelerator or brake pedal
the continuous brake is active
the distance control assistant brakes the
vehicle
power take-off is engaged
automatic speed adjustment is active
grey é symbol: cruise control is deactiva‐
ted.
white é symbol without PPC: cruise con‐
trol is active, but PPC is not available or deac‐
tivated.
white symbol é with PPC: PPC is activa‐
ted and cruise control is active.
green é symbol with PPCdisplay: PPC
actively regulates the speed and gear selec‐
tion in cruise control or for the distance con‐
trol assistant.
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