Thanks for the encouragement Johnny! I found that post & will be using it to guide me through the change out. I just bought my xf and I am new to all of this. I thought that I saw somewhere that the 2006 was built on the SLK321 platform rather than the SLK320 but now I can't find anything that varies that so I just want to make sure that the SLK320 seat frame is still the correct one to order.