I think you're both right. The transmission is not computer controlled, but the tranny does send a signal to the engine/ignition control unit to retard timing during a shift.

Check out this thread. http://www.peachparts.com/shopforum/showthread.php?t=177090&highlight=Transmission+overload+protection+switch

__________________
'94 E320 with 272,000 miles. '92 500SEL 133,000 miles.
Mods to the '94: TomTom GPS in place of ash tray, Auto Dimming Mirror ,Memory seat, DEI 545T Auto lamps, DEI 530T Auto Up/Down Windows, DEI Remote Start, Motorola Bluetooth® Car Kit, Built in phone charger using factory phone wiring, RainTracker Rain sensing wiper, Keyless Entry, Ambient lighting of center storage compartment. Soon: factory heated seats, REST
Mercedes-Benz is my addiction of choice.
http://www.youtube.com/vanwiek