2.6.3. Start of motion and gear shifting
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In a driver's foot well there should be no foreign objects capable to limit freedom of movement of pedals! When using emergency rugs or mats it is necessary to provide the sufficient course of pedals. |
Full load of the engine has to be given only after preliminary warming up it up to the normal working temperature which during the movement occurs quickly enough.
At start-off from the place on a slippery paving avoid a long provorachivaniye any of driving wheels as it can lead to damage of the power unit.
Models with RKPP
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The scheme of gear shifting is applied on the face surface of the handle of the lever of gear shifting. |
During the movement you make gear shifting according to technical characteristics of transmission, - try not to allow excessive increase in turns. The table of the high-speed modes of gear shifting is provided in Specifications to the present Chapter.
Inclusion of transfer of a backing has to be made only after a full stop of the car, - before inclusion the handle of the lever should be pulled up.
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At the movement on a slippery paving it is not necessary to make braking by transmission as it can lead to loss of coupling of wheels with the road! Remember that braking by the engine is always connected with the sharp increase in its turns fraught with serious internal damages of the power unit. |
Models with AT
Gear shifting during the movement of the car is made automatically depending on position of the lever of the AT selector, position of the switch of programs, the provision of a pedal of an accelerator and the current speed of the movement.Switchings of automatic transmission automatically adapt to an individual manner of driving, due to correction of the moments of gear shifting. Process of adaptation goes continuously taking into account the current values of working parameters of the power unit, characteristics of the movement, and also actions of the driver. Reacts to change of characteristics of the movement AT the adapted program of gear shifting.
Before a start of motion squeeze out a pedal of a foot brake for removal of blocking of the lever of the AT selector, then release the parking brake (see the Section Parking of the Car) and switch the selector lever to one of provisions of the movement. Wait for full inclusion of transfer, in particular at the cold engine, then release a foot brake and squeeze out the accelerator pedal.
Remember that before final warming up of the engine gear shifting is made at slightly raised turns that provides the accelerated warming up of the catalytic converter up to the normal working temperature.
At the movement it must be kept in mind that easy pressing the accelerator pedal provides earlier switching of transmission to an overgear while by strong pressing of switching occur later.
Squeezing of the accelerator pedal to a floor leads to automatic switching of AT to a low gear (kickdown mode), providing to the car the increased dynamic qualities. At an otpuskaniye of a pedal there is a return of transmission on higher transfer answering to characteristics of the current high-speed mode.
At a stop leave the selector lever in provision of the movement and by means of the foot or parking brake insure the car from advance, on rise - from rolling back.
When maneuvering in limited space regulate the speed of the movement by a gradual otpuskaniye of a foot brake. Press an accelerator pedal only slightly and do not play it.
Towage of the trailer should be made in the AT standard mode, - transfer the switch of the modes to the left of the selector lever to situation "S".
Provisions of the lever of the AT selector
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At the movement on a slippery paving it is not necessary to make braking by transmission due to transfer of the lever of the selector to the modes of limited ranges "D2" and "D1" as it can lead to loss of coupling of wheels with the road! Remember that braking by the engine is always connected with the sharp increase in its turns fraught with serious internal damages of the power unit. |
When switching AT move the lever along the directing groove. At extraction of a key from the ignition lock the lever of the selector is blocked in situation "P". In this case a lever conclusion from situation "P" is impossible even when squeezing a brake pedal. In order to avoid breakage of AT you transfer the lever to situation "P" only after a full stop of the car.
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Extraction of a key from the lock of ignition becomes possible only after transfer of the lever of the selector to situation "P" and otpuskaniye of a pedal of a foot brake. |
Situation "P"
In this position of the lever of the selector the blocking of transmission providing additional protection of the parked car is made. Always you transfer the selector lever to situation "P" at switching off or start of the engine. To bring the lever of the selector of ranges out of situation "P", it is necessary to squeeze out a brake pedal, previously having released the accelerator pedal. Reject the selector lever to the right and bring him out of situation "P".Situation "R"
Methods of management of the lever of the selector of ranges at its transfer from situation "P" to situation "R" (Backing) are described above. (Neutral) you make turning on of the lever in situation "R" from situation "N" only after a full stop of the car. If the backing does not join after a full stop of the car, squeeze out a pedal of a foot brake and slowly move the selector lever at first to situation "N", then to situation "R".Situation "N"
Use situation "N" (Neutral) at start of the decayed engine on the run and at short stops of the car with the working engine. If you for any reason need to depart from the car, previously transfer the lever of the selector of ranges to situation "P". At a lever conclusion squeeze out a pedal of a foot brake of situation "N".|
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Transfer of transmission to situation "N" during the movement is connected with risk of serious internal damages! Use this situation only at threat of a drift of the car at the movement on a slippery paving. |
Situation "D4"
In this situation the lever of the selector of ranges has to be constantly at the movement of the car in normal road conditions.In the range of "D4" (Movement) automatic gear shifting of the forward course depending on the speed of the car and extent of squeezing of the accelerator pedal is provided.
Situation "D3"
If the lever of the selector of ranges is included in the provision "D3", the automatic transmission functions similar to a case of inclusion of range of "D4" (Movement).Difference consists that transition to the fourth transfer is excluded. Range of "D3" is recommended to be used at towage of the trailer in the hilly area or for braking implementation by the engine on descent of the considerable steepness. Inclusion of range of "D3" is useful also for an exception of excess cyclic switchings of automatic transmission between the third and fourth transfers, - similar cyclic switchings of the transmission can be observed, for example, at the movement in a dense transport stream with frequent delays and stops.
For sharp dispersal of the car during the work of transmission in the range of "D4" or "D3" squeeze out the accelerator pedal against the stop. At the same time the transmission will automatically switch to adjacent lowest transfer (kickdown mode).
If the speed of the car is small, switching can happen on two steps down at once.
Situation "D2"
At inclusion of range of "D2" automatic transmission will constantly work at the second transfer.At a car stop the transmission does not pass to the first transfer. Constant inclusion of the second transfer provides good traction dynamics of the car on rises and a possibility of intensive braking with the engine on abrupt descents.
Range of "D2" can be used as an alternative to the winter mode (W, - see below) at a start of motion on a slippery paving, and also at the movement on deep snow. It helps to prevent strong pro-slipping of driving wheels of the car.
It is recommended to use the range of "D2" at the movement on abrupt passes, at towage of the trailer in the hilly area, and also for braking by the engine on especially abrupt descents.
At inclusion of range "2" on the run of the car activation of the second transfer to transmissions automatically is late and happens only after the speed of the car decreases to the safe level at which the frequency of rotation of a bent shaft of the engine will not exceed the most admissible value.
Situation "D1"
At inclusion of range of "D1" automatic transmission will constantly work at the first transfer.If inclusion of range of "D1" is made at a speed more than 50 km/h, then transmission at first will switch to the second transfer. Inclusion of an intermediate step allows to exclude sharp and unexpected braking by the engine.
The mode can be used at the movement with the trailer on especially abrupt descents and long passes.
Switching of the modes of functioning of AT
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The switch of the modes of functioning of AT is the lever of the selector of transfers at the left and is designated by letters of "W" and "S". |
Standard S mode
The standard mode is activated in position "S" of the switch and is intended for the movement in normal road conditions.Winter W mode
For transition to the winter mode of functioning of AT it is necessary to press the switch section "W".In the winter mode start-off of the car from the place is made on the second transfer - except for the movement with full loading or in position "D1" of the lever of the AT selector.
Switching of transmission is made by strong pressing of a pedal of an accelerator at lower speed of the movement the smaller speed of the engine, than in situation "S".
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The transfer relation of transfer of a backing in situation "W" decreases. |
Emergency operation
Transition of transmission to emergency operation of functioning is demonstrated by deterioration in dynamic characteristics and refusal of transmission of switchings. The probability of switching to the 2nd transfer or transfer of a backing is not excluded.In a similar situation it is necessary to stop the movement, to park in the safe place, to transfer the selector lever to situation "P" and to kill the engine.
Having waited for not less than 10 seconds, again start the engine and transfer the selector lever to situation "D" - the 2nd transfer will join. Transfer of the lever to situation "R" leads to inclusion of transfer of a backing.
The car should be driven away immediately on the nearest car repair shop Mercedes-Benz for performing detailed diagnostics of AT and performance of necessary recovery repair.