Unlikely that brake switch is the problem--Idle speed control fault is not affected by brake switch. Idle speed control fault is almost always associated with bad throttle actuator. Inop cruise control can be caused by either bad TA or bad brake switch. (because you have ISC fault AND inop cruise--you probably have bad TA)

If you can do without the car long enough for round trip shipping, I'm pretty sure 4mercedes and/or Beckmann can bench test your unit before you buy a reman.

By the way, I have had cases where clearing DM (pin 3) codes require that you go through the clear procedure, then turn ignition off, wait a half a minute or so, then turn igniton back on and check again. You should then get no blinks. You will not get a single blink until you have completed several drive cycles with no faults.

Hope this helps.

J. M. van Swaay

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