THANK YOU!! It really does seem useless, from here!! FYI: If the spare tire has lost pressure, as all tires eventually do, it will make that yellow light come on! Info. can be found in the owners manual. Better yet go to a Benz Dealer, which will be more than happy to check it for you.
Ps, now go slap a Polar Bear 3 times for good luck!!! - pushrod