If you have mobile phone iPhone or Andriod why by Sat Nat kit, just an extra bit of electronics. Get the Co-pilot app, it's £34 for all the EU maps, it's very accurate and has Safety Cameras (regularly update). Get
Steelie car mount looks neat and is simple, can get extras for other cars. If your car has stereo with Aux input or Bluetooth you can send the map voice to it and you will here the directions easily.
Simples!