'07 E320 Bluetec- NO FORWARD GEARS

[ROLLGUY]

My sister-in-law had her '07 E320 Bluetec (formerly owned by myself) towed to my place, with no forward gears. Reverse works fine. It has the 722.9 transmission. I hooked up my scanner, and found 5 transmission related stored codes. They were all CAN communication codes. However, I looked in the live data menu, and it seems that the TCM is receiving the proper signals from the shifter and engine. I suspect it has a hydraulic problem, or a bad solenoid (really just guessing here). The TCM is inside the trans, and is VIN coded, so no backyard swaps for it, dealer only. Anyone know if there is something I can fix, or is a trip to the dealer my only option?