Hi guys, doing my first trip to Europe by car. Driving to dover- ferry to calais, then to brugges, brussels and paris for 5 days. Has anyone relied on the BMW sat nav to get u back safely. I have a z4M roadster 2006(06) with inbuilt sat nav. Is that any good or do I need to buy TomTom. Any roads that I should do u guys will recommend in the this area. Cheers. Look forward to your advice.