If your wiring pins are corroded you can buy those pin connectors (both male and female) with some pigtail wires from MB.

You would need some very fine tools to take this apart and install the new pins, once you have fresh metal in there solder the wiring harness to it.

I repaired my antenna wiring plug like that - but I had a snipped off connector lying in my toolbox, I undid the connector and extracted a couple of pins with wires. Look up some articles for it. If this connector is the round pin type you are in luck, they are very easy to repair. My antenna connector had the miniature flat pins that modern MB have and are much more involved.

It looks like water has done some bad there, find the source of the leak or you might be looking at rust problems soon.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)