I've always had a bit of difficulty with the idea of trying to haggle over prices when buying anything new
It depends how many options you select. With a heavily-optioned car, providing you are aren’t draining the dealer’s time during the sales process, there should be plenty of dealer margin therefore room for some negotiation or for the dealer to include something at cost price. The level of interest in this of course depends by country as some have competitive dealer networks and some don’t.