From what I can tell, I have three ignition components: 1. The actual ignition lock with key, 2. The steering lock (mechanical portion), and 3. The ignition switch (electrical portion). How can you tell the mechanical steering lock problem from the ignition lock w/key problem? I know the key and lock is shot, but I don't know about the entire steering lock. Is one problem be independent of the other, can one cause another, or should all three components be replaced at once?

Also, How difficult is the replacement job individually or for the whole works? I have a Haynes manual and it doesn't look to hairy. What are the cautions and tips?

I tried to get a response from a repost, but no luck so I'm trying again. Any input would be appreciated. Thanks again for your help.

Joe

Hi Joe,
The difficulty of replacement is largely a factor of "does the key still turn"? If it does, replace the lock cylinder and see if the steering lock is okay. If the key does not turn, you save yourself a lot of time replacing the assembly.
What model is your car?
Regards,
Randy D.

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W.R.Durrance
ASE Master Tech
Mercedes Tech 19 Years

Thanks for reply. Its an 85 190E. The key still turns, but I have to pull it out a hair and turn it. Also, I cut the wheel so the steering does not lock (it never has when the steering wheel is not on center). I'll first try the lock and key as you recommended.

Hi Joe,
On a 190 it may be worth replacing the steering lock assembly as well as the tumbler. There is an updated steering lock with a stronger connecting piece between the tumbler and the electrical portion of the switch. If the steering lock has been replaced in the last 10 years it should already have the new piece.
Regards,
Randy D.

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W.R.Durrance
ASE Master Tech
Mercedes Tech 19 Years

The only way to know for sure is to take out the tumbler and use a tool to turn the lock and see if it is OK. I usually do them together because if you don't and it does lock up, you are stuck with a big problem.

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