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Originally Posted by Bigdaddybenz
Ok, so i took it to an independent Mercedes Service facility and had the transmission scanned... These were the results.
Code 124: The engine speed of engine is sporadically implausible.
Code 136: CAN communication with control unit Instrument cluster is sporadically disturbed.
Code 109: Component Y3/6n3 (speed sensor 3) sporadically faulty.
Code 147: The gear is sporadically implausible or transmission slips sporadically.
Prior to going to the shop I discovered that the fluid was about a quart and a half low due to a leak at the connector, so I topped it off.
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Were these all the codes from every computer in the car or just the transmission computer? The 136 CAN fault would be unrelated to a conductor plate issue.
At first I'd be looking at the transmission computer for oil infiltration from the leaking connector. Oil can wick up the wires and end up in the transmission computer. While oil is an insulator, graphite from clutches is a conductor and can cause all sorts of issues when it covers a computer board.
If no oil in the transmission computer plug, changing the conductor plate would be a good next step.
Quote:
Originally Posted by Bigdaddybenz
These were all STORED codes that were pulled but the CEL kept giving a PO715 code even after I rest it with OBDII several times.
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I'd have to check the list but I'm pretty sure P0715 is a generic " The engine computer is seeing codes from the transmission computer, scan the transmission computer for more details. "
Quote:
Originally Posted by Bigdaddybenz
The shop recommends replacing the conductor plate for a whopping $1,200.00.
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Did they give an itemized estimate?
Quote:
Originally Posted by Bigdaddybenz
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I was getting Doorman brand and the parts were actually marked with a MB logo and part number, not sure if this is still the case or not.
You won't have any problem changing this, remove conductor plug ( 7 or 8 mm headed bolt in the center ) the valve body then the conductor plate is atop the valve body. Your trans is late enough so there will be some screens under the solenoids, be sure to remove and clean these.
Quote:
Originally Posted by Bigdaddybenz
Also, the shop says they can put in a used transmission for$5,453.00 which is about $1,700.00 more than I paid for the car. I've found exact fit transmissions on ebay for $600.00.
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The $ 5,453.00 estimate for a used unit it so far out there it sounds like someone in the office chose a random number or quoted a MB reman. Did they give a itemized estimate for this? For a used transmission, have a look at car-part.com it is a search site for participating salvage yards. Call the yards direct as many have not figured out e mail.
Quote:
Originally Posted by Bigdaddybenz
From my research I gather that once the conductor plate is replaced the transmission shift must be re-learned/reprogrammed.
Has anyone every done this?
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The conductor plate does not contain any logic or computers. It is just a couple of speed sensors, a thermister for trans oil temp , reed switch for neutral safety and wiring for the solenoids to attach to.
Just changing the plate should not alter trans performance other than fixing a fault. Changing fluid could alter things but I would not expect a drastic change.
Relearn procedures generally consist of resetting adaptations then x number of shifts at light throttle. I'd have to dig for info on this.