Your'e not out of the woods yet. This is a classic problem on the 123 and 126 models. You will probably experience the problem a few more times, then one day it won't turn again no matter how you hold your tongue. You will have to tow the car in for surgery. My advice is to go to the dealer with VIN#, production date, and registration in hand and order a replacement tumbler to the car. You need to be able to turn the key to position #1 as an antitheft deterrant to exchange tumblers easily. Once you can't turn the key, your'e dead meat. Trust me: as a Mercedes repair facility owner for over 25 years, I've done it many many times both ways. I prefer to be able to turn the key and remove the lock in a few minutes. Good luck.

__________________
Auto Zentral Ltd.