Mercedes M-Class W163

since 1997 of release

Repair and car operation

Control systems of speed (Tempostat/Speedtronic)

General information

The control system of speed Tempostat/Speedtronic enters into a standard complete set of considered models. The system allows to support automatically the chosen cruiser speed of movement of the car without impact on a gas pedal. Value of cruiser speed should be not lower than 40 km/h. Application темпостата becomes especially convenient at long movement on the low-loaded direct country highways. For the purpose of safety it is not recommended to include темпостат at movement in the city, on twisting, abounding with turns, to roads, on a slippery paving, in a heavy rain and at other adverse weather conditions. In the cases listed above the driver should have possibility completely to supervise a mode of movement of the car.

Include a control system of speed only at movement on free highways and under favorable weather conditions.

The control system of speed on considered models can function in one of two modes: as темпостат a standard design and as system of variable restriction of speed (Speedtronic), - switching of modes is made by means of the podrulevy lever switch located at the left on a steering column, assemblies of the combined podrulevy switch are higher. The same switch provides possibility of management with functioning of a control system by speed within the chosen mode.

When using темпостата on the models equipped with RKPP try not to allow excessive increase of turns of the engine, in due time making gear shifting, avoid transitions to a low gear with a transmission of intermediate steps.

Management of functioning темпостата

Switching of modes of functioning of a control system by speed is made by pressing a face part thus activation of a mode of variable restriction of speed (Speedtronic) accompanied by turning on of the lever of the light LIM indicator built in in assembly.

The switch of activation/switching of control modes темпостата is located functioning on the right on a steering column (a management principle in a standard mode, - the LIM indicator does not burn)

Standard mode

The switch design темпостата allows to enter into memory of system as cruiser any current speed of the car if it exceeds value in 32 (petrol models)/40 (diesel models) km/h, - rather quickly to wring out a control lever up or down. After input of cruiser speed release a gas pedal.

Increase and fall of value of cruiser speed is made by a lever otzhimaniye up/down respectively and its keeping in this situation.

Short-term acceleration of the car, for example at overtaking commission, can be made by a way of squeezing of a pedal of gas, - after a pedal otpuskaniye speed will automatically decrease to brought in memory темпостата cruiser value.

After car dispersal till the speed is higher 32 (petrol models)/40 (diesel models) km/h brought in memory темпостата cruiser speed can be caused by a way of short-term procrastination of the lever on itself.

For switching off темпостата it is enough to wring out the switch lever from itself, or to press its face handle. - the chosen value of cruiser speed remains in memory of system.

At a key povorachivaniye in the ignition lock in situation 1 or 0 there is a dumping brought in memory темпостата cruiser value.

To switching off темпостата leads also squeezing of a pedal of a foot brake, more than 4-second squeezing of a pedal of coupling (models with RKPP), and also transfer of the lever of the AT selector to the situation "N" (models with AT).

Speedtronic mode

The Speedtronic system provides variable restriction of speed of movement of a vehicle according to chosen уками.

The variable limiter of speed allows not to exceed at the expense of restriction of turns of the engine some established threshold of speed, for example, in need of rigid observance of traffic regulations.

Activation of a mode of variable restriction of a high-speed mode is made by pressing a face part of the handle of the lever of the switch темпостата and accompanied by operation of the switch of the yellow LIM indicator built in the handle, - the similar indicator is built in also speedometer assembly on an instrument guard of the car (see. Section Combination of devices, measuring instruments and control lamps and light indicators).

The switch of activation/switching of control modes темпостата is located functioning on the right on a steering column (a management principle in a standard mode, - the LIM indicator burns)

Change of value of speed limit (with a step in 10 km/h) is made by an otzhimaniye of the lever of the switch up or down, the chosen value of speed limit will be highlighted on the screen of the speedometer of the display built in the dial under burning LIM indicator. At the working engine input of any restriction of a high-speed mode, since value of 30 km/h is possible.

On models from AT the established limit of speed can be exceeded when squeezing a pedal of gas against the stop with overcoming of a point of resistance (kickdown mode inclusion).

Unlike a mode темпостата squeezing of a pedal of a foot brake does not lead to shutdown of the limiter of speed.

The exit from a mode of restriction can be made by a way of a short-term otzhimaniye of the lever from itself, or in pressing an end face of its handle, - indication of LIM should go out. Automatic shutdown of the limiter occurs at car dispersal in the kickdown mode till the speed exceeding established limiting value more than on 20 km/h.

If the limiter does not cope with an objective, for example, at movement downhill, the alarm buzzer is activated, and on the screen of the display of a combination of devices «LIMIT EXCEEDED» message is deduced.