Sure sounds like an ETA problem. Codes will tell you a lot more. Even though stop lamp switch has been replaced, it could have failed again. Easy to check and fix--be sure to rule this out first.

ETA's fail in three ways, bad wire, bad motor, bad feedback pot. Bad wire failure is the only one solved by a rewire. Bad motor is not fixable, bad pot is fixable, but only by Beckmann Technologies.......

From what you describe, you may have a bad motor....

J. M. van Swaay

__________________
1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles