It's very possible that the ETA had failed . . ref pot, clutch solenoid, etc . . and rebuilding it made it worse.
Also has the engine wiring harness been replaced?? If not, that does need to be done asap. The bad harness could have caused damage to a ECU.
After the w/h is replaced and if the ETA still doesn't function, it needs to be tested and inspected to see what's wrong. Beckmann is one place that can test it. See Menu#24 . . direct link:
http://www.k6jrf.com/MB_asr.html They may be other places also.