In my search for a 19"rim/tire combo, this one vendor tells me not to do it, never!! he goes on to say MBs are very temperamental and that I should stay with OEM and here's the juice: that 19" tires are rarely manufactured and the ones that are made are made to wear out very fast!!!!!! Ouch, what a load of BS. I agree that the more common setups are 18 and 20. But 19" tires are no different from other tires. can one our tire gurus comment please?