Can I ask to remove car options?

Hi, A car has some standard features which are mandatory and are pre-installed from the manufacture itself. I have noticed the difference between standard features and additional options when I was browsing manufacture's website and was checking Build option. For example (www.mbusa.com). However, when I asked for quoted from many dealers, I found out that they have some options already installed in the car which are not Standard Features as per the manufacture's website. Can I ask them to remove these options before making any deal? Please clarify.