Yes, the T-30 is what you want to use.

T-27 was used on mine half a dozen times with no damage to bolt and with enough security to hold the bag in place during an airbag deployment. T-27 was also recommended to me by the Crossfire/Mercedes tuner veterans on this board, and it worked beautifully each time I needed it. No damage to my bolts at all.

The T-30 *just* fit in my steering wheel, but it took some persuasion.

Neither of these will fit in Steve's airbag bolts.