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.
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.
The shop recommends replacing the conductor plate for a whopping $1,200.00.
I was a mechanic for 20 years so I've decided to DIY it as I can obtain not only the conductor but a new connector, filter and gasket on line for $68.00, it's after market but has great reviews.
https://www.ebay.com/p/Transmission-Conductor-Plate-Connector-Filter-Gasket-Kit-for-MERCEDES-722-6/853691352?iid=331594680632&rt=nc#UserReviews
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.
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?
Thanks in advance!!