300E 5-Speed Swap ECU question

[DieselPaul]

We are looking to swap a 5speed into a 1990 300E using a 1986 300E donor car. The '86 was in a junkyard so we do not have the car sitting here, but got the driveshaft, crossmember, pedals, flywheel, trans, etc.

I have done manual swaps on benzes before but all diesels.

Can we simply replace the auto with the manual setup and will it run fine? The '86 looked to have different computers than the '90 does but I did not know if you need the manual ecu to run the manual trans.

I realize the 722.4 is mechanical, On some GM cars (used to mess around with Fieros) if you put a manual gearbox behind some motors they would stall unless you changed the PROM in OBD1 or reflashed the OBD2 ecus with the manual maps. I agree applying GM know-how to a Benz is frequently dangerous, but I would rather ask now than have a car that stalls every time we dip the clutch.