I would advise going with the E55 AMG mounts. Look at the thread below. Let me know if you have any questions.

https://www.crossfireforum.org/forum...tml#post835681

EDIT: Just saw you already purchased them. If the picture is correct those look identical to the factory crossfire mounts so I am sure they will fit, they just don't seem as durable as the E55 mounts. The white rubber shroud is just some aftermarket stuff, no need for it on the crossfire as the factory has metal heat shields. I will warn you fishing the mounts out is not easy and I would advise unhooking the steering arm for a little more room to work.