Mercedes S-Class W-220

since 1998 of release

Repair and car operation

W220 Mercedes
+ Mercedes-Benz Cars of a class S (W220)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
- Automatic transmission
   Problems of the block of electronic control and operating signals
   Search of malfunctions - the general information
   Removal and AT installation with the hydrotransformer
   The AT electrohydraulic control unit (AT is established)
   Dismantling and assembly of the electrohydraulic control unit
   Dismantling and assembly of a plate of gear shifting
   Case of transmission and hydrotransformer
   Multidisk brakes В2, VZ and a blocking gear wheel at "Parking"
   Dismantling and assembly of a back hollow shaft with the back coupling of a free wheeling
   Removal and installation of multidisk brake В1 and oil pump
   Dismantling and assembly of the oil pump
   Dismantling and assembly of multidisk brake В1
   Dismantling and assembly of multidisk brake В2
   Dismantling and assembly of a target shaft with the central and back block of planetary gear wheels
   Removal and installation of multidisk couplings К1, К2 and К3
   Dismantling and assembly of coupling К1
   Dismantling and assembly of a leading shaft with coupling К2 and the forward block of planetary gear wheels
   Dismantling and assembly of coupling К3
   The blocking mechanism at "parking"
   Removal and installation of the lever of the selector of gear shifting
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Cхемы

Automatic transmission

General information

Separate characteristics are provided also in the text of Head and in case of obligation of their performance are allocated with a bold print

Type 5-step, with electronic control by gear shifting.
(W5A330) 722.617
(W5A330) 722.618
(W5A580) 722.632
S500, S55AMG
(W5A580) 722.633
 (W5A580) 722.649
Transfer relations and involvement of elements AT

(1) The switch of program switching in situation S
(2) The switch of program switching in situation W
(3) Actuation mechanisms of switching only at movement nakaty
W5A 580, Main transfer
W5A 330, Main transfer
Applied liquid
S 280, S 320
7.0 l, MB No. 001 989 21 03 10
S 420, S 500, S 600
9.0 l, MB No. 001 989 21 03 10
Codes of diagnostics of system of electronic control by the automatic transmission, taken by means of the OBD II scanner are described in specifications to Head engine Electric equipment.
Efforts of a tightening of carving connections, H • m
Oil stopper of AT
Oil stopper of the AT hydrotransformer
Pallet AT bolts
Lock screw of draft of the AT selector
Bolt of fastening of the hydrotransformer to a leading disk, М8
Drain stopper in the transmission pallet
Nut of fastening of the driveshaft to a transmission, М12
Bolt of fastening of the electromagnetic valve to a gear shifting plate
Bolt of fastening of a cover of the case of valves to the case of valves, М6х30
Bolt of fastening of a lateral cover to a cover of the case of valves and the case of valves, М4х12
Bolt of fastening of the case of transmission to the hydrotransformer case
Bolt of fastening of the pallet to the transmission case
Nut of fastening of a flange of a target shaft
Bolt of fastening of the electrohydraulic control unit to the transmission case
Bolt of fastening of multidisk brake В2 to the transmission case
Bolt of fastening of a doggie to the lever of the selector of gear shifting
Drain stopper of the hydrotransformer

Cut of automatic transmission

1 — the Entrance shaft
2 — ECU
3 — the Intermediate shaft
4 — the Blocking gear wheel of a parking
5 — the Target shaft
6 — the Oil pump
7 — Gidrotransformator
8 — a reactor Shaft
9 — the Blocking coupling of the hydrotransformer
В1 — Multidisk brake assembly В1

В2 — Multidisk brake assembly В2
В3 — Multidisk brake assembly В3
F1 — F1 Flywheel
F2 — F2 Flywheel
N — Back planetary assembly
К1 — Multidisk coupling К1
К2 — Multidisk coupling К2
К3 — Multidisk coupling К3
M — the Central planetary assembly
V\Forward planetary assembly

The scheme of transfer of rotation in position "1" of the AT selector

1 — the Entrance shaft
2 — the Target shaft
16 — the Blocking coupling of the hydrotransformer
A — Speed of rotation of a cranked shaft
B — Transmission, speed of rotation on an entrance
C — the Relation of the 1st transfer
D — the Relation of the 2nd transfer
E — the Relation of the 3rd transfer

F — the Fixed parts
H — the Back set of planetary transfer
L — Stator
M — the Central set of planetary transfer
P — Krylchatka
T — a turbine Wheel
V\Forward set of planetary transfer

Control unit automatic transmission

К38 — the Module of the relay of blocking of a starter
N2/2 — the Module of management of SRS
N15/1 — the Module of management of 5-step AT (TCM)

N15/3 — the Module of management of transmission (TCM)
N54 — the Module of management of RCL

Arrangement of the module of management of automatic transmission

Automatic transmission, in the course of a troganiye from a place, carries out function of ordinary coupling, and during movement performs work on gear shifting.

The AT main hubs are: torque converter, planetary reducer and hydraulic or electronic control system. Hydrodriving disk brakes and disk coupling are applied to transition to another transfer the relation in a planetary reducer.

The torque converter on the functions corresponds to hydraulic coupling. Its task includes coupling implementation at a troganiye from a place and gear shifting.

Principles and schemes of construction and functioning of AT are in detail considered in the management «Automatic transmissions of modern cars» of ARUS publishing house.

The control system of transmission (known as system of electronic synchronous switching) is a component of the modified control system of the engine. The control system can work in a special safe mode to which passes at detection of any malfunction. Thus operating modes of transmission are limited, and the car can be delivered under the own steam to repair shop. Upon transition of a control system to a safe mode on a control panel the control lamp (address to Head the Operation manual) lights up. Analyzing information arriving from various sensors (not only the sensors which are directly related to transmission), the control system chooses optimum from the point of view of profitability, smoothness of a course etc. a box operating mode. At the certain provision of a zaslonka of a throttle the control system can block the hydrotransformer in such a manner that the fourth and fifth transfers will join only. It reaches considerable decrease in consumption of fuel.

The unique regular procedure of service of a box is check of level of working liquid (address to the Section Check of level of oil of automatic transmission). Regularly to change transmission liquid it is not necessary.

Near a radiator of system of cooling the cooler of transmission liquid is established.

The traditional switch of the Kick-Down mode is not present. Inclusion of this mode is carried out directly by a control system of transmission after processing of information arriving from the sensor of provision of a butterfly valve.

There are some operating modes of transmission, each of which can be involved after moving of the selector to one of the following provisions: P, R, N, D, 1, 2, 3, 4 (address to Head the Operation manual).

The engine can be started only if the selector is in situation P or N. It is made to prevent car movement in start attempt (if the selector is established in one of other provisions). Analyzing information arriving from sensors, the control system resolves or forbids engine start. The locations of various relays are specified in Head Onboard electric equipment.