The problem i have is that when i hear “Dealer Addon” i see $$$ in labor costs. I just purchased an Outback and they gave me $15% off retail on parts and then proceeded to charge me $$$$ for instalation that would have been included in a factory build.
So, for example, i asked about the Remote Start for the Outback and they wanted $600 to install. The little security module to expand ability was aslo $$$ in labor for a little module to plugin.
Also, you have to make sure dealer knows how to add the parts to the purchase or they are not covered by the 3yr 36K factory warrenty. They screwed up with the Wheel Moldings and Side Body Molding i added and this they would have to redo the paper work, but i agreed that these are not critical and could live with the 1yr 12k. If i ordered the Remote Start i would have had them rewrite it....