Driving on poor roads and in difficult conditions
In hilly or difficult driving conditions e.g. forest,
construction site or off-road driving, it can be
advantageous to use driving program P+ (option),
which gives fewer gear changes. Gear selection is
optimised for higher engine speeds to achieve good
response and acceleration at the expense of optimum
fuel consumption. This also gives greater tolerance for
changes in road inclinations.
To prevent unplanned gear changing, select manual
mode.
To prevent up-changing when e.g. driving uphill, the
minus button can be held pressed in. The function can
also be used just before an uphill slope to get a higher
speed into the uphill slope.
To achieve the greatest down-change possible, e.g. just
before a steep uphill slope, hold down the minus
button, move the gear shift lever from position A to M
and then release the minus button.
In normal driving conditions, return to the E driving
program by pressing the E/P button for optimum fuel
consumption.
Disengaging
If rapid disengaging is required, e.g. in slippery
conditions, move the gear shift lever to N, neutral.
Starting when stuck
1. Rocking free
On slippery surfaces, e.g. snow or sand, the truck can
be rocked free by carefully pressing down and
releasing the accelerator pedal. You then gradually
extend the wheel tracks you have got stuck in.
1 Make sure the differential locks (see “Driver's
Manual”) are fully engaged
I-Shift
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