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  #1  
Old 12-22-2019, 08:13 PM
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Join Date: Sep 2004
Location: Las Vegas, NV
Posts: 701
99 e320 w210 key won't turn in ignition

The electronic key is not being recognized by the infrared key system in the 210. It doesn't engage with that click when you insert the key. And of course the key won't turn. I suppose it is either the electronic ignition key unit/optical system or the steering lock. Or its just a bad key. I changed the battery and the battery store tested it, fwiw. Any thoughts on that?

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2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School
www.Newgateschool.org - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
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Las Vegas NV

Last edited by dlssmith; 12-22-2019 at 08:29 PM.
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  #2  
Old 12-22-2019, 09:21 PM
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Join Date: Nov 2010
Location: TX
Posts: 3,978
The coin battery has nothing to do with starting the car, the igntion key module inductively charges the key when its inserted.

It is empirical that the battery has ample voltage to start the car otherwise the key may not work. If its really cold where you are, first charge up the battery with another car and use a hairdryer on the ignition key module then retry.
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  #3  
Old 12-22-2019, 10:34 PM
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Join Date: Sep 2004
Location: Las Vegas, NV
Posts: 701
Quote:
Originally Posted by Zulfiqar View Post
The coin battery has nothing to do with starting the car, the igntion key module inductively charges the key when its inserted.

It is empirical that the battery has ample voltage to start the car otherwise the key may not work. If its really cold where you are, first charge up the battery with another car and use a hairdryer on the ignition key module then retry.
Alas, I'm in Las Vegas. 52 F today. You are correct about the voltage. It could be that simple. I will attach a charger before anything else.
__________________
DS
2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School
www.Newgateschool.org - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
06 Passat 2.0T, PITA, sold

Las Vegas NV
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  #4  
Old 12-23-2019, 05:54 AM
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Join Date: May 2000
Location: Soperton, Ga. USA
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Just recently had this happen on the 02 E320 that I fixed up for daughter. Problem was the steering lock mechanism p/n 208-462-04-30.
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  #5  
Old 12-23-2019, 10:59 PM
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Join Date: Jul 2005
Location: Seattle, WA
Posts: 596
I just reviewed this gadget on Amazon even though I didn't need it .... yet.
Subsequently, I had an opportunity to work on another family E320 and it helped
narrow down the troubleshooting options and saved a little bit of tail chasing.
The culprit turned out to be a break in the coil and a small dab of soldering did
the trick.
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  #6  
Old 01-02-2020, 11:25 AM
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Join Date: Nov 2010
Location: TX
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This tool is pretty neat - I'll buy it just because its so easy, A freind of mine made me a similar item but its a simple LED and a circuit that inductively fires it - Need a bit of darkness to see it.

If the induction coil is not working, the key wont spit the code to the ignition.

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