The MB Nav actually shows the Exxon or Shell or Mobil logo instead of just generic gas stations logo. In my 2008 X5 (with 2008.1 map), you have to go all the leg works like Penguin said to display the POIs where in MB Nav you can select default POIs to show all the time.

Those POIs are not my complaints though since basically you can achieve the same thing in different ways. My biggest complaints would be on how the routing works. I'm hoping it gets better with latest maps (2010.1 maps from NavTeq whenever they release it).