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  #1  
Old 01-30-2012, 08:29 PM
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W126 Ignition switch turns, but no start detent or spring back

1987 300SDL

Everything else is fine; no stuck key, etc. Key inserts fine, turns fine and all idiot lights, accessories, etc. work the right way. Just no pressure against the key in the start position, no 12 volts going to the solenoid, and no key spring-back. With the key in the normal "run" position, one position counter-clockwise from "start," the starter can be hot-wired and the car runs fine.

I've read a lot of threads about pulling bad tumblers, etc., but want to know what the problem here really consists of, and what needs to be replaced.

thanks!

I found a thread that seemed to be about this, but there was a lot of shorthand in it that I didn't really understand.
so my ignition switch quit working
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  #2  
Old 01-31-2012, 12:59 AM
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Off hand it sound like the steering lock assembly, that is what has the spring to bring the key back to the run position.

No 12V to the solenoid, might be the Ignition switch, which is on the rear of the lock assembly.



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 02-01-2012, 03:47 PM
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Steering lock assembly

Thanks.

So if the key turns the mechanism, doesn't get stuck, etc., Should I take the old tumbler out of the Steering Lock Assy, and put it in a new assembly with a new ignition switch on the back end of it? Would there be an advantage to replacing the whole Steering lock assembly/lock tumbler/ignition switch all at once?

thanks
Bruce s
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  #4  
Old 02-01-2012, 04:03 PM
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Quote:
Originally Posted by charmalu View Post
Off hand it sound like the steering lock assembly, that is what has the spring to bring the key back to the run position.

No 12V to the solenoid, might be the Ignition switch, which is on the rear of the lock assembly.



Charlie

not so.
the spring is in the electrical portion of the switch. the part on the end of the assembly has the spring, where the pins are.
if it's available separately, you can replace just the back end!
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
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Old 02-01-2012, 04:10 PM
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126-removing elect. portion of ignition switch
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 02-01-2012, 04:12 PM
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Ignition switch removal W126 - how to?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 02-01-2012, 04:59 PM
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Quote:
Originally Posted by vstech View Post
not so.
the spring is in the electrical portion of the switch. the part on the end of the assembly has the spring, where the pins are.
if it's available separately, you can replace just the back end!

OK, you are right. I have one w/o the switch and one with the switch. w/o the switch, it just turns around and around.

with the switch, there is the spring action.

Charlie
__________________
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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  #8  
Old 02-01-2012, 05:19 PM
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Dont forget that just about any locksmith can match a new ignition to your old key. Be a good time to get a new set of keys from the dealer too.
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  #9  
Old 02-02-2012, 04:49 PM
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switch, here we come

I'll report back. Thanks, everyone.

Bruce S
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