Installation details of the electrohydraulic control unit for shifting AT 722.6 (using the rear-wheel drive model as an example)
2 - Transmission housing; 3 - Oil pan; 3a - Retainer; 3b - Bolt (TORX); 4 - Drain plug of the oil pan AT; 5 - ATF filter; 19 - Electro-hydraulic shift control unit; 19a - Bolt (TORX); 21 - Guide bushing; 26 - 13-pin connector; 62 - Heat shield; 69 - Magnet; a - Socket for installing speed sensor 3 (Y3/6n3); b - Socket for installing speed sensor 2 (Y3/6n2)
1. The installation details of the AT 722.6 electro-hydraulic shift control unit are shown in the illustration, to which all references in the text refer.
2. Jack up the car and place it on supports.
3. Remove the key from the ignition switch.
Note: On models equipped with the Keyless Go system, press the Start-Stop button to turn off the ignition, remove the smart card from the vehicle and move it beyond the transmitter's sensitivity range.
4. Move the actuator lever of the gearshift drive on the transmission housing to the "P" position (see illustration AT shift drive design).
5. Remove the engine compartment trim panels and unbolt the support bracket from the rear panel.
6. Remove the heat shield (62) and disconnect the 13-pin electrical wiring connector (26).
(Article was borrowed from the website: MERCEDESMAN.ru)
7. Release the AT from the crankcase and remove the guide sleeve (21).
8. After unscrewing the plug (4), drain the ATF from the AT crankcase - do not forget to replace the sealing washer, if necessary (if the oil is contaminated) flush the ATF cooling lines.
9. Loosen the mounting bolts and remove the transmission oil pan (3).
10. Remove the magnet (69) from the tray and clean it of any metal filings that have stuck to it.
11. Remove the ATF filter (5).
12. Unscrew the bolt (19a) and remove the electro-hydraulic shift control unit (19).
13. Installation is carried out in the reverse order - make sure that the crankcase is filled with transmission fluid correctly.