S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Tranny Issue

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Old Feb 1, 2022 | 07:16 PM
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From: Wash. D.C.
'20 S63
Tranny Issue

Can anyone help to decipher these codes? Car jumps out of gear/tranny slips and I have to restart the car to get it to move. After about 5-10 mins. of driving it stalls again.


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Old Feb 2, 2022 | 09:58 AM
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'71 Pinto
Looks like RPM sensors are failing, incorporated into conductor plate which needs replacement. Part # diagram is from comparable vehicle, suggest pulling # with VIN.




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Old Feb 2, 2022 | 10:00 AM
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
I am not affiliated with these guys but I came across this from prior research. Could be a good option for your situation. However, your codes do not appear to be on their list.
https://circuitboardmedics.com/merce...te-tcm-repair/

Last edited by kevm14; Feb 2, 2022 at 10:03 AM.
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Old Feb 2, 2022 | 10:14 AM
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Thanks for the replies!!!!
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Old Feb 2, 2022 | 12:52 PM
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S500
Originally Posted by kevm14
I am not affiliated with these guys but I came across this from prior research. Could be a good option for your situation. However, your codes do not appear to be on their list.
https://circuitboardmedics.com/merce...te-tcm-repair/

there are two speed sensors one is a repairable job the other rarer failure is not fixable (or wasn't as of a few years ago) - it is safer to fit a new one... they are vastly cheaper than they once were... but it is linked to the immobiliser and Merc don't like to sell outside main dealership - plenty on naughty software out there lets naughty people swap data over - I would never bother with a repair myself

it won't be the cause of the slippage issues - if its a V12 you need an overhaul - they only last a few miles if you open the throttle
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Old Mar 5, 2022 | 10:52 AM
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From: Wash. D.C.
'20 S63
Found a leak at the Trans Electrical Connector. Replaced connector and all is well.
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