Transmission May not Shift into Drive Due to Failed Selector Module on Mercedes-Benz S550 4MATIC

The transmission drive selector module may fail resulting in the loss of gear selection capability. This condition can leave the vehicle stranded, and will require replacement of the drive selector module.

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Average mileage: 68,457 (11,000–147,000)
4 model years affected: 2007, 2008, 2009, 2010
13 people reported this problem
6 people shared problem details
Transmission stuck in one gear.(safe mode)
Will not go into drive park netrul nothing
I have a 2001S500 with the same problem car runs and looks good wont change gears and shifter dont shift dont know what to do
Once it woldnt cold start in garage, it would load up and stall. Ran fine next day. Then a few months later it went 2 miles then came home in limp home mode.
I've had this problem too on my 2002 C240 147K miles, then Replaced the Tranny fluid and can drive for another 300 miles then problem happened again. Already checked for no leaks of fluid.
Transmission switched to low gear and stayed there - so you can only travel at about 15-20 mph. Mercedes dealership says that the electronics force it into a "safe mode" when this happens so one can not damage the transmission. Despite it being covered fully by warranty, it makes me uneasy in a car with 11k miles!!!
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