No, I don’t believe it would be some sort of trick to get more business. Have you been servicing it at a Mercedes-Benz dealership, or perhaps a regular mechanic? It could be a reset glitch after the last service.

I agree it's a problem. Unfortunately Mercedes-Benz didn't respond to our request for information on how to solve your issue, so I would suggest you contact a sat-nav specialist outlet and enlist their help.

As you say Mercedes generally cost more to service and repair, particularly if you have a dealer do the work.

They're not as expensive if you use an independent Mercedes specialist, and there are plenty around who can do that for you. They not only charge less for their labour, they usually have access to cheaper parts. Most of those parts are full factory parts, just sourced from overseas, instead of locally, so you don't miss out on quality or reliability by using them.

Jeep owners generally swear by the cars, but they have had issues over the years that should make you wary about signing on to the brand.

There's not much to split them, perhaps I would prefer the 'Benz.