IF:
your car is under factory warranty or starmark you're okay
you spend $100 per 18/mo (at one time) at a dealer, per year you're safe.
you purchased your car from a Mercedes Benz dealer, new or used you're safe.
you can't expect them to support you, if you don't support them, correct? (I believe this also applies to the DADT thread
)
I have my service done at a variable of places, first, independent shops, foreign domestic or otherwise (varies on job) second some dealer specific stuff, or myself I always meet or exceed their new requirements... seriously? buy 2 sets of wiper blades a year and you're set. one wiper blade and a voltage regulator, 2 ball joints and a set of wiper blades. Does MB apparel not apply? buy yourself a sweat shirt or a polo.
read the letter front to back. any questions on it call the 800 number, or talk to someone at the dealer, they're all properly informed.
Don't turn to the forum (which don't get me wrong is filled with mounds of useful information information) that is laced with a bunch of over anxious opinionated people.
get your panties out of a bunch boys... Roadside will still be okay if you show your support for the people that have assembled your fantastic machines!
TIP: find an MBCA participating dealer, and get just a little more bang for the buck!