O2 sensor question

[DCF]

I just had codes pulled for a CEL that came on a few days ago in my 99 ML 430 (75k miles). The scanner at Autozone said it was the oxygen sensor on Bank 2, sensor 2. Here are my questions:

1) which side of the car is bank 2, driver's or passenger's? (I just searched old postings here and found ones that go both ways, but I believe bank 2 is driver's, but never hurts to double check) Also, since I am double checking, sensor 2 is post-Cat, right?

2) Is the Bosch sensor that MercedesShop sells as part # C5010-180636 a universal or is it ready to go with the plug on it? I prefer the ones with the permanent plugs, not the universals with the wires w/o connector.

Thanks.