As mentioned the 5 series have Nav. The Cadillac's ( speaking the CTS ) has NAV, remote start, depending on trim HUD and 360 cameras.

The C series Mercedes did have nav, but they no longer get the SD nav card ( so I was told).

I wish they have more large series vehicles ( BMW 7 , Mercedes S and etc..)

However, the price and cars so far for me have been well above other rental agencies offerings. With the exception of National and the Tahoe LTZ that is one nice vehicle in my opinion.