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MY2000?
Wow, not many folks with post 1999 cars have 722.6 troubles. It was pretty well sorted out by then. The abrupt shifts sound just like the ETC problems. Possible it's got an "older" ETC?
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SUBJECT: DEALER TECHNICAL BULLETIN 58/99
*** REPLACE MB-NET NO. 696 DATED 12-20-99 WITH THE FOLLOWING ***
58/99-2 GROUP 27 - MODELS 202, 208, 210, 129, 140, 170 WITH AUTOMATIC TRANSMISSION 722.6: There have been some new electronic transmission control (ETC) modules produced for the correction of codes 053, 134, 146, 149 as well as improvements to the 1-2 full throttle upshift and the 3-2 downshift. The part numbers for these new ETC modules are as follows:
M119/120 engine - 026 545 72 32
M113 engine - 026 545 73 32
M112 engine - 026 545 84 32
M111 engine - 026 545 82 32
M104 engine - 026 545 85 32
For the 220, the improved software has a part number of 022 545 51 32 which is already installed in all but the very early production 220's, so please check prior to replacement.
NOTE: Does not apply to tiptronic shifted vehicles.
The ETC modules can be ordered using the 26 extension on the part number and the VIN to ensure proper version coding from Germany. Part numbers do not apply to AMG vehicles.
Please remember that software will not correct a hardware problem, so please check the vehicle carefully before changing to assure that the control module replacement is required.
Service Engineering
NYdg
12-29-99
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