Find a new dealer. If their parts manager (not the counter guy) doesn't know about this, be VERY suspect about how they service your car.

Call Tom Hanson at Caliber Motors (1.800.CALIBER) or Randy and EPS Parts (http://www.epsparts.com).

I'm on travels so I don't have the lock grease/lubricant PN# handy.

If your MB is newer than 1985, I would NOT use any other lubricant especially graphite which will cause problems with the alarm system.

:-) neil
1988 360TE AMG
1993 500E