I've done a few on earlier models.

I wouldn't do it again - not for the fait hearted. I've also had compressors fail - thats what has put me off. My opinion is that $650 is worth it.

Although, the back in earlier models were easy. I don't recall using a compressor - just a jack and lowering the LCA. DO NOT try this on the front springs though - DEATH is a possibilty!

All that said. I would take it to the dealer.