parallels my experience - first CSR would not make any attempt to "tack on this promo to the first90day free trial" provided by MDX being an '05 and new sign-up. Refused outright (wasn't ugly or anything...just following her policy as she knew it).
So thanks to this thread....I called back....and pursuaded the 2nd CSR to go ahead (she did not want to initially) enter the promo and see "if the computer" would accept the promo...and it did. She was surprised herself....and commented it may be due to the type of car, as she had attempted to "tack on" the 1yr promo to GM cars still in the free 90day trial period...and her computer would not allow it.
maybe Acura has cut a deal w/ XM ?
FWIW, she never did ask me for the promo code, but seemed immediately to be aware of it. Also, she asked where I had seen the promotion...told her a forum for cars.
'05 MDX Touring w/ Navigation, Aspen Pearl White with saddle interior, spoiler, all-weather mats, body sidemolding (wide), wheel locks, and tow hitch/kit