Neither does it say it does support Crossfire SRT, it does say Crossfire. There are marked differences between 2 models, as we know. If it can be told it's "working" on a SLK32 AMG and function correctly I'm pretty sure it will "work" on an SLK 320 when in fact it may be hooked up to a Crossfire Limited or base model. Some people dig buying stuff at FCP Euro which doesn't even acknowledge a Crossfire when it would be very easy for them to know that they share hundreds, if not thousands, of parts and systems.