I was looking at an ELR ay my Cadillac Dealer and the salesperson saw me looking and jumped. I was curious so I went into his office and he pulled out the GM invoice and I noticed it had 2 advertising charges of $800 + $800 for $1600 added to the invoice at the bottom of the invoice. (wow is the ELR expensive - $80,000 to save $2,000 / year in gas) He offered me the ELR at invoice less any applicable rebates. I asked about that charge and he said it was for advertising in our area in papers and TV. I was really just waiting for my Cadillac service and wasting time. I went home to do research on GM advertising and found than many dealers have up to 2% added to pay for there manufacturers website and local advertising.
read this article as this makes a lot of sense. http://www.jamesblackcadillac.com/noads.html
Next Cadillac I will be shopping for a dealer that does not have any or smaller percentage of advertising added to my next vehicle. You can save $1600 on this vehicle if you go to a Cadillac dealer that does not have any advertising built in on the invoice. The article above says each dealer can choose what level they want including not selecting any charge at all. Like I said the next Cadillac I will be shopping the advertising level at the dealer as well as the amount they are charging above invoice.