Retarder - Renault Premium DXi 11 Service Manual

Driving
C4-7

Retarder

Choose the step-down ratio allowing
you to use the engine at its best speed.
On hilly runs, use the retarder, if
necessary.
Never drive downhill in neutral.
Do not use the retarder on slippery
surfaces. Actuate switch (A4) to
disable automatic operation.
When the retarder function is active, a blue
sector appears on the engine rev counter (T).
This blue sector shows you the maximum
efficiency band of the retarder(s).
The engine-brake and propeller shaft retard-
er features are inhibited in the ABS and ESP
phase.
Never let the engine speed reach the red zone (runaway speed).