Sorry for the all-too-simple questions, but I just wanted to get it right.

I just replaced my old silver-colored York compressor with a new black York compressor about a month ago.

My questions are:
1. I was told all new York compressors now come in black. True?

2. Is the receiver and dryer referring to the same thing? If so, should I also replace it?

3. Does my car have an expansion valve? If so, should I also replace it?

Hope that you guys will help me out, thanks in advance!

Mervyn
1983 W126 (280SEL)