Operation Refuelling (diesel fuel)
Note: With switch (2) pressed down, it is necessary to release the accelerator pedal completely to permit braking with the retarder.
Depress the accelerator pedal. Braking of the bus by the maximum retarder stage is interrupted. Note: Whenever the accelerator pedal is operated, retarder braking will be interrupted until the accelerator pedal is fully released again.
The “Retarder active” indication display on the display screen goes out.
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CITARO (Euro 5/EEV)/10.2011 GB
M54.00-1780-71
Press the upper section of switch (2). Braking of the bus by the maximum retarder stage is disabled.
Refuelling (diesel fuel) Use only diesel fuels compliant with EN 590 (refer to the Specifications for Service Products). Engines with BlueTec exhaust gas aftertreatment system must be run only on fuels having a fuel sulphur content of less than 50 ppm. In the cold season, use winter-grade diesel fuel (effective down to approximately -20 °C). If outside temperatures fall even further, the flow properties of the diesel fuel could deteriorate to an unusable level due to paraffin separation. As a preventive measure for this situation, it is permissible to add a specific amount of an approved flow improver proportionate to the outside temperature. Engine output may be degraded in line with the amount of additive. The amount of additive should therefore be kept as low as possible under consideration of expected outside temperatures. Observe all relevant safety regulations. Flow improvers are fuel additives that improve the flow characteristics of the fuel. Do not add flow improvers to winter diesel fuel rated as effective
