Mercedes S-Class W-140

In 1991-1999 editions

Repair and enterprise of the car

Mercedes S-Class
+ Mercedes Benz cars of the class S (W-140)
+ operation manual
+ Routine maintenance
+ motor
+ cooling systems, heating
+ systems of power supply and edition
+ electric equipment of the motor
+ Gear shifting boxes
- awtomatitscheckaja transmission
   Specifications
   Search of defects - the general information
   + Automatic transmission 722.5
   + Automatic transmission 722.6
+ connection
+ brake system
+ Aufhängung and management
+ body
+ electric onboard equipment

awtomatitscheckaja transmission

General information

Automatic transmission, in the course of troganija from the place, fills function of usual connection, and during the movement work fills after gear shifting.

Main AT hubs: reformer of torque (hydro-transformer), planetary Reduziergetriebe and hydraulic or electronic tax system. For transition to other transfer the relation in planetary Reduziergetriebe gidropriwodnyje of a brake of glasses and compound of glasses are used.

Design AT is typical


1 — the student of gas station of transmission of oil 2 — Schilda 3 — the contact plug 13 4 — transmission 5 — a wave kardannogo flange 6 — blocking of position of the parking	7 — Selektors draft 8 — system of the edition 9 — the carrier of system of the edition 10 — a cross beam by means of a support 11 — the association tire with a weight

Section of automatic transmission

1 — an entrance wave
2 — ECU
3 — an intermediate wave
4 — a parking block gear wheel
5 — a transfer wave
6 — the Fat pump
7 — the hydro-transformer
8 — a reactor wave
9 — Blocking hydro-transformer mufta
B1 — brake installation of glasses of the multimillionaire of B1

B2 — brake installation of glasses of the multimillionaire of B2
B3 — brake installation of glasses of the multimillionaire of B3
F1 — F1 Flywheel
F2 — F2 Flywheel
N — back planetary installation
K1 — compound of glass of the multimillionaire of K1
K2 — compound of glass of the multimillionaire of K2
K3 — compound of glass of the multimillionaire of K3
M — the center planetary installation
V \planetary forward installation

The reformer of torque after functions corresponds to hydraulic connection. Execution of connection at troganii from the place and gear shifting belongs to its task.

The tax system transmission (known as electronic system of synchronous switching) is a component of the modified tax system the motor which will be only on models with AT einsteilbar.

Scheme of an arrangement of electronic components of tax system

Position of the AT control unit (N15/3). In motor office, on the right at a partition

The tax system can work in the special sure mode into which at detection of some defect passes. At the same time operating modes of transmission are limited, and the car can be parked by the movement up to repair shop. Upon transition of tax system to the sure mode on the control panel a control lamp (on burns address the head to the operation manual).

Information analyzing which works about various sensors, (chooses not only sensors which have a direct relation on transmission), tax system optimum from the point of view of profitability, the movement river, etc. an operating mode of boxes. At a certain position saslonki of a thrush the tax system can block the hydro-transformer thus that only the fourth and fifth transfers to be enlisted. From this reach considerable immersion of consumption of fuel.

The only regular procedure of service of boxes is a check of level of working liquid (watch office check of levels of liquids, control of a vytecheniye of the head Routine maintenance). transmissionnuju liquid it is regular change should not go.

Along with the cooling system heater the transmissionnoj refrigerator of liquid is defined.

There is no traditional switch of the kickdown mode. Activization of the mode is directly carried out from tax system transmission after information processing which works about a sensor of situation drosselnoj saslonki.

There are several operating modes of transmission, each of them can be applied after shift of Selektors to one of the following provisions: "P", "R", "N", "D", "1", "2", "3", "4" (address the head to the operation manual).

The motor can only be started if there is Selektor in situation "R" or "N". It to prevent is made the movement of the car in start attempt (if Selektor in one of other provisions is defined). Information analyzing which works about sensors, allows tax system or forbids start of the motor. Places of various relays are specified in the head the electric onboard equipment).