



MB - ISM
Mercedes-Benz
Intelligent Servo Module
The intelligent servo module (ISM) for Direct Select (A80)
is mounted on the left side of the automatic transmission in the
direction of travel it allows the system to read the selected drive
position via electrical signals and to engage the drive position
via a mechanical interface on the transmission .
Used in Mercedes-Benz vehicles
with 722.9 7G-Tronic
Typical Trouble :
- Error 1984
Description : Unknown fault code Unknown fault type 1
- Error 1994
Description : Component A80
(Intelligent servo module for direct select) is defective Repair
Only the new type need Online SCN coding
Old type no need for SCN coding or other special procedure to be performed
1-select vehicle
2-selection sensor adaptation procedure to be executed
3-this can be done using the MB-STAR/XENTRY diagnostic tool