Lastly, the replacement costs for parts, labor and programming for this issue can range from $2,000-$4,000, depending on the type of TCM your vehicle is running. The new TCM still needs to be "married" to the vehicle, which requires SCN coding/programming abilities that most individuals do not have access. Secondly, a replacement TCM is not "plug and play" on the vehicle. First, Mercedes-Benz classifies this Conductor Plate (TCM) as a "theft-related part," making it difficult to purchase as an individual or small shop. While providing improvements in overall shift comfort and driver experience throughout the gear set, they are unfortunately prone to failure, specifically in the speed sensors on the Conductor Plate / Transmission Control Module (TCM).įor the consumer or independent automotive shop, this failure can be a significant event for several reasons. The 722.9 (7G Tronic) transmission is Mercedes-Benz's 5th generation automatic transmission with 7 forward and 2 reversing gears first introduced in 2004.
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