99 mercedes clk320

I bought this car already in limp mode . I scanned with my scanner, and got the code 0715 . So i put the car up on my ramps, and jackstands, popped the tranny pan drain bolt and let it drain overnight . Following day,  i dropped pan, unplugged the 13 pin connector, dropped the valve body and replaced the conductor plate . Still in limp mode . Had battery disconnected while doing all of this . Anything else ? I like this car, but im already fed up . Replaced fluid and filter as well .