Did you guys tell him to remove the TCU and look on the bottom side where the sticker w/the passkey is usually found? Maybe he just looked at the TCU and assumed there was no label? It is not visible without actually removing the unit.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4