272
Driver assist systems
Function
Speeding up or shifting down when almost at the top of a hill does not constitute a
proper and economical driving style. As soon as the vehicle has past the crest of the
hill, the vehicle speed would increase again. This increased speed would activate DSC
to slow the vehicle down again to keep the downhill speed control set speed.
In this situation PCC, allows the vehicle speed to drop down below the cruise control
set speed and, if fitted, prevents the automated gearbox from shifting down. This
ensures a smoother, more fuel efficient ride to the top.
Once over the crest, the vehicle picks up speed again. As the starting speed is lower,
it takes more time for DSC to intervene and/or the automated gearbox to shift.
Using the PCC data, the EcoRoll function can also be optimised by starting earlier or
suppressing very short activations of this function.
Adapting set speed(s) and gearbox shift behaviour (if an automated gearbox is fitted)
in this way optimises drivability and fuel consumption.
8.12 TYRE PRESSURE INDICATION (TPI)
8.12.1 TPI (Tyre Pressure Indication)
TPI (Tyre Pressure Indication) is a
function of EBS that monitors the tyre
pressures, without directly measuring
the pressure in the tyres. A tyre
pressure loss is calculated from a
change of the tyre circumference.
If TPI detects a low pressure on one of
the tyres, a TPI warning is activated on
the master display. TPI indicates which
tyre is low on pressure.
D005257
PCC
-7
80 83
km/h
Check tyre pressure rear
right
DW63246305.book Page 272 Friday, March 22, 2019 4:54 PM
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