Mercedes S-Class W-140

1991-1999 of release

Repair and operation of the car

Mercedes S-Class
+ Mercedes-Benz cars of the class S (W-140)
- Operation manual
   Specifications
   + Access, protection
   + Elements of security systems
   + Car equipment, arrangement of devices and governing bodies
   - Comfort
      Independent heater
   + Methods of operation and auxiliary systems
+ Routine maintenance
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Comfort

The automated air conditioning system (climate control)

General information

The automated air conditioning system which is included in a basic equipment of all models functions only at the working engine. At the choice of economy mode (EC), the cooling system does not work.

Transition to the chosen temperature condition is always made with the maximum possible speed.

Insignificant fluctuations of temperature around the established point are explained by impact of sunlight and temperature drops of external air.

The design allows to support systems an individual microclimate on both sides of salon.

The step of change of temperature has to be not too big.

The connected filter which is built in an entrance path provides protection of salon against penetration in it of dust and pollen of plants.

General comments on functioning of the K/V system

Functioning of the K/V system can lead to formation of condensate under the car bottom, - education under the parked car of a small pool in hot weather should not cause concerns.

In a hot sunny weather before a start of motion it is necessary to air the interior of the car heated by the sun.
You watch that air vents in space between the back shelf and back glass of the car remained open.

In the winter before a start of motion clean from snow an air inlet lattice before a car windshield.

In case of leak of coolant functioning To/in automatically stops and the system switches in economy mode.

Governing bodies

Scheme of distribution of an air stream and elements of management of an output stream of a forward air path


1 — the Regulator of the section through passage of the left side nozzle 2 — the Regulator of the section through passage of the left central nozzle 3 — the Regulator of the section through passage of the right central nozzle 4 — the Regulator of the section through passage of the right side nozzle	5 — the Deflector of the left central nozzle 6 — the Deflector of the right central nozzle 7 — the Deflector of a side nozzle 8 — the Button of inclusion of heating of an output stream 9 — the Button of inclusion of cooling of output subcurrent 10 — the K/V Control panel with the digital information display

The air supply air duct nozzle deflector in a back part of salon (model without back conditioner)


1 — the Regulator of the section through passage of a nozzle

Deflectors snuffled an air supply air duct in a back part of salon (model with the back conditioner)


1 — temperature Regulator on the left side of a back part of salon 2 — temperature Regulator on the right side of a back part of salon 3 — the Regulator of the section through passage of a nozzle	4 — the Deflector of the left nozzle 5 — the Deflector of the right nozzle 6 — the Regulator of the mixing gate of the directions of distribution of an air stream (through nozzles / in foot wells)

Air supply in interior of the car carries out on network of the air ducts of system of ventilation terminating in the nozzles equipped with deflectors.

In a forward part of salon air moves in four main directions: on the front level of the driver and forward passenger (central and side deflectors of the dashboard), on having blown in a windshield (forward deflectors of the dashboard), on having blown in side glasses (side deflectors) and in foot wells (the lower air ducts).

Output nozzles of forward air ducts settle down on the dashboard and in foot wells of salon.
Design of zhalyuziyny deflectors of days off snuffled air ducts of front level allows to operate intensity (the full overshoot of a nozzle is made by turning of the regulator against the stop to the right) and the direction (assembly of a nozzle is rotary) leaving a stream. Two push-button switches built in between the central deflectors allow to include/switch off autonomous heating / cooling of the leaving stream.

In the basic mode all buttons are wrung out.

Deflectors snuffled a path of air supply in a back part of salon can have one of two designs, depending on that, the mode of conditioning is provided here or not.

The control panel of functioning To/in with the digital information display which is built in it is located in the top part of forward section of the central console.

The control panel of functioning of the automated K/V system

Design of the control panel of the K/V system

— Buttons of inclusion of the AUTO mode
— Buttons of increase in value of the maintained temperature
— Buttons of decrease in value of the maintained temperature
— Button of inclusion of the mode of removal of condensate/defrosting of glasses
— Button of switching of the modes of air circulation

— The connection button to the entrance air highway of the K/V system of the saloon filter
— Button of inclusion of heating of back glass
— Buttons of distribution of distribution of an air stream
— Button of inclusion of economy mode
— Keyboard switch of the compulsory choice of the high-speed mode of functioning of the fan
— Button of inclusion of the mode of use of residual heat of the engine

Mode of automatic functioning

The mode of automatic functioning of system is basic. For activation of the mode press at the same time the buttons in the top corners of the control panel, - the light-emitting diodes which are built in buttons have to light up. For installation in salon of comfortable room temperature (22 °C) press at the same time the buttons and. The display the following information will be displayed:

Intensity of giving and distribution of an air stream in this mode will be automatically regulated. Buttons of the choice of temperature conditions on deflectors of the central air ducts of the dashboard have to be wrung out.

Mode of defrosting of glasses

Completely open sections of side glasses through passage of the dashboard.
For activation of the mode of defrosting of glasses press the button, - the control light-emitting diode which is built in in the button has to light up. The display the following information will be displayed:

Shutdown of the mode of defrosting of glasses is made by repeated pressing the same button.

The mode of removal of condensate from glasses

For bystry removal of condensate from glasses switch off economy mode or the mode of the closed circulation, then activate the automatic mode simultaneous pressing of buttons (control light-emitting diodes have to light up) and by means of buttons manually choose the air supply mode in the top part of salon. The display the following information will be displayed:

Do not forget to open completely sections of side through passage snuffled dashboards.

Economy mode

For activation of economy mode press the EU the button, - the control light-emitting diode which is built in in the button has to light up.

In economy mode such functions of system as cooling and drainage of air are turned off.
Shutdown of the mode is made by repeated pressing of the same button.

Compulsory choice of the direction of distribution of an air stream

The choice of the direction of distribution of an air stream is made by means of control panel buttons. Press the buttons until display confirmation on the required switching is not displayed. In the example given below the air supply mode is chosen on having blown in glasses of a driver's half of salon and in legs of the forward passenger:

For activation of air supply through the central nozzles of the dashboard press one of buttons of deflectors.

Return to the automatic mode is made by pressing of the AUTO buttons.

Compulsory choice of intensity of air supply

The choice of one of seven high-speed modes of functioning of the fan can be made manually by means of the keyboard switch, - the confirming information in a graphic look is displayed the display (blackout of sections of the wedge-shaped indicator):

By means of the same switch shutdown To / is made by V. continue to press the switch until display the message of "OFF" is not displayed and air supply in salon stops:

Shutdown of air conditioning system for a long time can lead to fogging of glasses.

Activation To/in can be made by pressing one of buttons or, or pressing the section "+" of the keyboard switch.

Mode of use of residual heat of the engine

Heating of salon can be made during even some time after an engine stop due to use of residual heat. Activation of the corresponding mode is made by means of the button on the control panel, - the control light-emitting diode which is built in the button has to light up.

Before inclusion of the mode turn a key in the ignition lock in situation 0 or 1, or take it from the lock. Also it is necessary to block the section of a nozzle through passage / snuffled a back air duct
In the mode adjustment of intensity and the directions of air supply is made automatically.

Necessary condition of use of the mode is the sufficient level of a charge of the rechargeable battery.

Switching off of the mode is made automatically on a timer signal approximately in 30 minutes, when turning a key in the ignition lock in situation 2, and also at noticeable decrease in level of a charge of the rechargeable battery.

Air circulation mode

Activation of the mode of air circulation is made by means of the button of the K/V control panel, - the control light-emitting diode which is built in the button has to light up. In this mode shutdown of giving in salon of fresh air is made. This function allows to prevent hit in interior of the car of the gas-polluted or unpleasantly smelling air.

Long use of the closed circulation, leads to fogging of glasses and increase in a spertost of air therefore it is recommended to include this mode only in case of need and for rather short time, for example, at the movement on the area with the smoke-filled or polluted atmosphere. As soon as need of isolation of salon disappears, supply of fresh air has to be resumed.

Repeated pressing the button of the switch allows to restore air supply.

Also automatic shutdown of the mode of the closed circulation on a timer signal is provided: approximately in 30 minutes at temperatures of external air above +5 °C, in 5 minutes at temperatures below 5 °C and in 5 minutes in the economic (EU) mode of functioning of air conditioning system.

At high temperatures of external air activation of the mode of the closed circulation is made automatically, - approximately each 30 minutes in salon the portion of fresh air will move. Besides, to automatic activation of the closed mode gives dangerous increase in concentration in an entrance stream of monoxide of carbon (SO) or oxides of nitrogen (NOH) provided that the mode and temperature of external air is turned off +7 °C are not below.

Connection to the inlet air highway of the saloon filter

By pressing the button of the K/V control panel connection to the inlet air highway of air conditioning system of the saloon filter filled with absorbent carbon is made. The fact of activation of the filter is confirmed by operation of the switch of a control light-emitting diode which is built in the button.

Connection of the saloon filter allows to limit sharply concentration in an inlet air stream of harmful components and to prevent penetration into interior of the car of unpleasant smells.

For the purpose of preservation of the set intensity of air supply at connection of the filter fan turns
To/in automatically raise.

Increase in concentration in external air of monoxide of carbon (SO) or oxides of nitrogen (NOX) leads to automatic activation of the mode of the closed circulation (see above).

Activation of the modes and defrosting of glasses () leads to automatic shutdown of the saloon filter.

In need of bystry warming up / cooling of salon the filter also should be switched-off.

Heating of back glass

Heating of back glass functions only in situation 2 keys in the ignition lock. Activation of a heating element of back glass is made by means of the button on the control panel of the K/V system (see an illustration 19.3), - the control light-emitting diode which is built in the button has to light up.

In winter season before inclusion of heating remove with frost and snow flew down.

The heating element of heating of back glass consumes a lot of electric power therefore it is not necessary to activate it for a long time.

Automatic shutdown of heating is made on a timer signal approximately in 12 minutes.

Shutdown of heating of back glass can happen also at simultaneous activation of a large number of consumers of the electric power, and also at noticeable decrease in level of a charge of the rechargeable battery, - the control light-emitting diode which is built in the button will begin to blink. With restoration of level of tension the heating element is activated automatically.