Yes, don't get MB parts from Performance Products. I ordered some parts based on their picture and they shipped the wrong part. I emailed them about it several times and they did not even answer. That was a month ago, but their picture still shows the mismatched P/N.
They used to be OK as I had been ordering Porsche parts from them (as Automotions) for years, but now I found out they are not very good with Mercedes parts.
AutoHausAZ has better price too.