If the TCM has failed, it's probably from ATF wicking up the wires and into the module. Sometimes it can be cleaned, sometimes it's fried. In all cases, it needs a new connector at the transmission. If I tried to drive it home as-is, I'm sure it would go into limp mode and stay in 2nd gear before it got here. When they become intermittent, it's only a matter of time before the computer decides to protect the powertrain. https://www.amazon.com/Mercedes-Transmission-Connector-Adapter-Genuine/dp/B00DOCVVVI
Usually intermittent weirdness comes from the conductor plate, not the TCM. https://www.amazon.com/MERCEDES-BENZ-TRANSMISSION-CONDUCTOR-1997-2007-E300-E320/dp/B007V6FGGO My S420 TCM was dry, the only problem was ATF on the connector pins down at the trans. And this is a car that some idiot drove to work all winter in 2nd gear. A new connector, a can of brake cleaner, and a computer reset was all it needed. > On May 31, 2018 at 9:43 AM Karl Wittnebel via Mercedes > <mercedes@okiebenz.com> wrote: > > > Sounds like the transmission control module is out. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
