If you're ever in doubt about their roadside assistance coverage you can try calling them before a trip to see if the road there is within their area of coverage.
Roadside Assistance is available virtually anywhere in Canada or the continental United States. Specific coverage details can be obtained by calling the Mercedes-Benz Roadside Assistance number 1-800-387-0100.
Virtually anywhere? I just know that it isn't everywhere, but I believe that it covers most areas that an average person would find themselves. As long as you aren't driving into the NorthWest Territories you should be fine.
Runflats are the moronic way to gain modest space by trading: performance, ride quality, safety, versatility, tire quality and limited replacement options, dubious reliability, initial weight and expense. Even if you can't change a tire, it's cheaper to join AAA. The concept of run-flats especially in any vehicle claiming any offroad capabilities is a bad joke. Driving anywhere other than the populous coasts in the U.S., it's easy to find yourself more than 50 miles from any service. Such a 'minor' consideration in deciding about a $50,000 purchase? You're **** right; veto BMW, GLC, w/ Q5 marginal as it's a fake spare. Bought fantastic Nokia WR tires for an old Forester; true winter rating but quiet, longwearing 4 seasons as well, which also made it drive like a better car. Looking at the same for '13 Impreza with crap for OEM tires. Guess what choices you'll have when your OEM runflats wear at 15-20k? Same junk tires period, and they cost a fortune. Collusion between mfg and tire makers takes advantage of average user ignorance. Will 'self-driving' cars change their own flats?
I've heard many stories of people waiting hours before being helped by these services. Then once helped/towed, when do I have my vehicle back? If I now always need a roadside service program, I have another monthly fee, so Mercedes can save a few dollars in the name of 'saved space'. Its an SUV for goodness sake, what space am I saving, enough for a first aid kit?. I can put a spare tire on in 20-30 minutes, and be on my way, make it home, life is good, no monthly fee, no waiting, no towing, this is a deal breaker for me, for any vehicle.
Feels like there are two sides to this. Those who are more hands on will want the spare. but even with the lack of a spare, the GLC boot is still somehow smaller than others. It feels more like the size of a saloon boot rather than a crossover due to the realatively shallower height.