There are two other companies that rebuild ETA's, they are Beckmann Technologies, and 4Mercedes. BT is a little more expensive, but they were very very helpful when I dealt with my ETA problem. 4Mercedes would probably be OK as well, but they were less helpful when I talked to them on the phone. There are three common ways these things fail. They are bad wire harness, bad motor, and bad feedback potentiometer. Bad wire harness is DIYable if you are handy with a solder iron, and have some craftsmanship skills to disassemble/reassemble the plug. A bad motor can not be fixed as the motor is a press fit into the housing. BT is the only rebuilder (at least to my knowledge) that can repair a defective feedback pot.

Many DIY rewires have failed because of a bad motor or pot..... (my record is 50/50)

If I were to have this problem again, I would use BT even if they cost a bit more.

J. M. van Swaay