Too bad you took it in. You had done 90% of the work the first time.
Anyway, the replacement motor solves the problem.

Does your fan run at max, or do you eventually blow a fuse. I found out that the 84's have a 16 amp fuse for the blower motor, and that the later models use a separate 25 amp fuse for the blower motor. Generally if I let the fan run on max for a while, I pop a fuse.

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Jovan

'84 (11/83) 190D 2.2 5-Speed; Silver/Blue; Motor No. 00354, 402k mi (340+kmi mine)

'89 Porsche 911 Turbo Coupe; Black/Black; 53kmi
'05 BMW 530i 6-Speed; 302kmi
'19 Range Rover; 30kmi