Renault Premium DXi 11, Service Manual

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C4-14
Driving
Exhaust brake with engine brake"OPTIBRAKE" coupled with a
VOITH hydraulic retarder (with Optidriver 2 gearbox)
Depending on your vehicle's equipment
Use the gear combinations to choose the down-
hill speed according to the gradient. To slow
the vehicle, release the accelerator pedal and
move control lever (1).
5-position control: except in case of absolute
need, never move control directly from posi-
tion 0 to position 5.
– Position 0:
The feature is not active: the warning light (Q)
together with the rev counter blue sector (T) are
extinguished.
– Position 1 with action on the accelera-
tor pedal:
The exhaust brake, engine brake plus prop shaft
retarder feature is preselected but is not active:
the rev counter blue sector (T) is illuminated.
– Position 1 without action on the accel-
erator pedal:
The exhaust brake, engine brake plus prop shaft
retarder feature is active at about 25% torque
efficiency depending on the vehicle load: warn-
ing light (Q) together with the rev counter blue
sector (T) are illuminated.
This blue sector indicates the maximum efficiency band of the retarder.