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  #1  
Old 06-12-2010, 10:56 PM
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Ignition cylinder problem...

...on an 87190d. The cylinder was sticking a bit when I would turn the key to heat up the plugs, and a quick blast of wd-40 seemed to cure it. A couple of weeks later there is still no sticking, but the mechanism which springs back the key after you start the car seems to be non-existent now (i.e. I have to physically turn the key back to the glow plug-light position to keep the starter from grinding.) I dont really mind doing this but I am wondering if this will eventually lead to a complkete fdailure and what I would need to replace exactly to prevent this, (as I have discovered on this site that there are several parts to an ignition assembly). Thanks, Ben R.

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  #2  
Old 06-13-2010, 01:10 AM
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well Iam thinking you are going to need to change the steering lock assembly.
The spring part that returns it from the start position would be in this part and not the lock tumbler.

look in the buy parts tab above for your yr model. think it is $112.



replace it before it totally quits.

I replaced this part about 6 mo back. I thought it was the tumbler, but after getting it from the dealer, still had the problem,
ordered this from Phill, and it fixed the problem.

Charlie
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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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  #3  
Old 06-13-2010, 01:15 AM
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You might be able to R&R the ignition lock assembly and save some money (spring came out of line?) but now you also have the problem of having squirted WD-40 into a lock. It will inevitably gum up and you will have to replace it at some point.
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  #4  
Old 06-13-2010, 02:10 AM
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Thanks for the advice guys. So would you recommend just going ahead and replacing the steering lock piece and the tumbler? Is it a DIY and of not, how much would it cost to have it put in?
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  #5  
Old 06-13-2010, 03:08 AM
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This is a DIY.

Now this is how I did it on a 123. I think your 190 is similar.

Disconnect the neg cable to the battery. safety first

Remove the instrument cluster, will make it easier to reach in to work.

place key in position 1 or 2, think 2 and insert a paper clip into the hole in the tumbler.
Reach in and remove the plug at the rear of the assembly. this is the ignition switch.

Unscrew the collar and remove the tumbler.

Remove the little black plug

Remove the 2 vac lines to the shut off valve. be sure to mark them so you know what side they go on.

Remove the 10mm bolt that holds the clamp on, may have to access it from under the dash.

Slide the clamp to the side to expose the button. see the picture I posted above. it is the brass colored button. I think it sort of faces to the front of the dash. push it in, rotate the lock assy. this will keep the button in the tube depressed. I had it pop back in the hole 3 times before I got it out.

Wiggle the assembly to the right away from the steering column and pull out.
It`s a little tight quarters, but it will come out.

Looking All Parts Express, looks like the 190 parts has to be ordered seperately. when I ordered the one for my 123, it came with a new ign. switch and the vacuum shut off valve.
So you will have to R&R the parts off your old one to the new one.
2 screws for the vac valve, and 3 for the ign. switch.

slide in the new assembly into the tube.the little button will pop back in the hole. tighten down the clamp. plug in the little black plug. plug in ign switch plug. Install the 2 vac lines to shut off valve. Install the tumbler and collar.

Replace the instrument cluster.

think that is about it.

Charlie

Your tumbler might be ok, but if you shot it with WD-40, might be a good idea to wash it out with some soap and water, and blow it out with air.
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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  #6  
Old 06-13-2010, 06:54 AM
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I did this job on my 300SD a while back, and while it's a bit of a pain getting the lock assembly out due to tight quarters, it's definitely not all that bad a problem.

It also made a world of difference in the ease of turning the key in my car. Even with the tumbler removed, and using a large screwdriver to engage the mechanism that the tumbler normally turned, the lock was binding.
Once the column lock was replaced, there were no further issues, even with the old tumbler reinstalled.
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  #7  
Old 06-13-2010, 07:57 AM
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All of the above, except that for the w201, I had to lower the steering column the get room to remove the lock. It's a baby benz....
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  #8  
Old 06-13-2010, 09:49 AM
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Quote:
Originally Posted by tbomachines View Post
You might be able to R&R the ignition lock assembly and save some money (spring came out of line?) but now you also have the problem of having squirted WD-40 into a lock. It will inevitably gum up and you will have to replace it at some point.
The tumbler internals are all brass and needs no lubriction. Spraying anthing in the tumbler may help temporarily to unstick the gunk already there but will eventually gunk up again. I had success cleaning a gunked up tumbler with solvent followed by hot water & dish detergent. Do it it a clear plastic container and you'll be amazed at what comes out. Work the key in and out of the tumbler while in the hot water to loosen the gunk between the wafers & springs.
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  #9  
Old 06-13-2010, 10:46 AM
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If you clean it that way you might want to follow up the water/detergent with a shot of electronic parts cleaner to evaporate any water or residue that's sitting in there. Follow that with a sqirt of graphite for a dry lubricant. My opinion.

But replace the lock assembly at a minimum. If it fails and you can't turn the key, the tumbler (hardened steel) has to be drilled out.
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  #10  
Old 06-16-2010, 07:55 PM
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Thanks to everyone for the detailed replies. Looks like my best bet will be to replace the steering lock assembly and clean out the tumbler as suggested. Ill post on my progress as it occurs.

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