1993 300e wiring harness replaced, now tonnes of DTC's

[LeeZilla]

Benz'ers,

I just finished replacement of the upper engine wiring harness and the ETA on my 1993 300e (3.2l). Now I am getting a large number of DTC's off of pin 8. Before I stopped checking, I read:

2, 3, 4, 5, 8, 9, 13, 16, 45, 46, (then I stopped, it's freezing outside).

It will start and idle, but only with the MAF disconnected. If I have the MAF connected it will start briefly but then either die right away or BARELY idle and stumble.

I replaced the harness with a used harness that was from a 1994, but the date code on the harness was 1999. The replacement wires are in great shape and passed a basic continuity test before I installed it. The installation went well, the only tricky part was the bit under the plastic front cover on the engine. I have giant hand but I managed.

Any thoughts or anyone solve a similar issue?