If you’re just sitting there in the front seat that’s suspicious.
The trick is to use your cellphone. An innocent prop that’s easily visible to passersby on the streets outside of the vehicle. A cellphone with a 3.7 inch AMOLED display and 24-bit color, angled to reflect conspicuously through the driver’s window, is a tool to transform you from threat to non-threat.
With a cellphone in your hand, you’re just some guy checking a map, email, or text message. Whatever. Just checking something before you go home for the night.