http://web.wenxuecity.com/BBSView.php?SubID=auto_best&MsgID=2749
well i have my own share of horror stories from dealing with dealers and that is one of the reasons why i started doing jobs myself mostly. i won't try to bore ppl here with them. Fool me once shame on you, fool my twice, well....
The answer to your Qs are already in the previous write up. and believe it or not, IT really works.