123 ignition removal

[Ktook]

1985 123 300D Key will not turn the ignition. It worked nicely for perhaps 15 years, but, now, it will accept the key, but the key does nothing. You cannot turn it. The key is in the off position and can be removed. It sits in my garage (I am thankful it happened here) and I can easily work on it. I have lots of tools, but don't have the foggiest notion as to where to start. I can see a groove between the outer ring of the switch but it appears to do nothing when I insert a strong paper clip. Where do I go from here, other then have the car towed to a dealer, which is miles away..

Thanks in advance.. Ken

[donbryce]

Do a search on this, there are lots of threads on removing the tumbler and, if necessary, the entire lock assembly. Use keywords 'ignition tumbler'.
I just succeeded doing this last week. Mine's a 1985 380SE, the W126, but if you have the same ignition as mine, forget the paperclip and go to the hardware store or auto supply place and get an allen wrench set with a .050" allen key on it. It's made of hardened steel and worked on mine like a charm.
Unfortunately, though, the key has to be in the #1 position to allow the insertion tool to work to release the black metal collar holding in the tumbler, so this isn't any help if your key won't turn.
Find the thread on removing the lock assembly when the key can't be turned.

[cdplayer]

Try this
http://www.mercedesshopforum.com/shopforum/showthread.php?p=1065596