Benz C-Class 2015(C300 4MATIC Sedan) Current Price 37869, more bargaining?
 

My wife need to a new car and the C300 looks good for us.
Currently I got a "good" price from a truecar.com dealer online. The original truecar price is 39069 and we have 1000 off discount plus some small dealer discounts. It seems that this is not the dealers' bottom price. I saw others shared their prices in autopriceshare.com and some deals are better(like 36953).

Do I need to continue bargaining with dealers or just take this deal(37869 for C300 4MATIC Sedan 2015)?

I just purchased my new car yesterday. The final price is $37500 (by cash) and autopriceshare dealer give me two times free maintenance. this is a base model without any packages.