I have a 2001 VW TDi, the radio is a standard Double Din so I just replaced it with a touchscreen bluetooth receiver for around $150.

They could just incorporate a gasket + screws. There are a ton of waterproof devices that have replaceable batteries.

This was a decade ago, but when my mom signed up for Dish Network I asked the installer about getting the internet package. He laughed and said to avoid it like the plague. The guy claimed that at the time Direct Tv and Dish Network used the same satellites for internet, two of them to be exact. The rates for using the service went up with high server load and it was only really usable after midnight.

I ended up building a Cantenna from two Bush’s Baked Beans cans and $15 worth of radio equipment from radio shack and “borrowing” free Wi-Fi from a mansion about a mile away.