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Key unlocks doors but wont start car

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Old Aug 27, 2015 | 01:02 AM
  #51  
inaminute 57's Avatar
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e320 1999
Remove battery cable door 5 minutes and it should work....
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Old Nov 5, 2015 | 01:46 PM
  #52  
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MERCEDEZ BENZ C240
I have a 2004 MERCEDES BENZ C-240 And would like to know if a ENGINE START BOTTON that i purchase on ebay can work with it.?
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Old Nov 5, 2015 | 11:15 PM
  #53  
Holmes5518's Avatar
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From: Northwest Arkansas
2016 C450
Originally Posted by Amaurym1970
I have a 2004 MERCEDES BENZ C-240 And would like to know if a ENGINE START BOTTON that i purchase on ebay can work with it.?
No. Those buttons are for keyless go vehicles.
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Old Mar 14, 2016 | 08:51 AM
  #54  
bigmath76's Avatar
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Mercedes c 180
Key issues

Originally Posted by Moviela
That is the secondary in the picture. Right under is a fairly large capacitor I suspect is used to smooth the output of the coil. It is also rather heavy, and could be broken loose. Look carefully for hairline cracks on the solder fillet at both ends.
I had same issue the key would work intermittently but then it would only work the doors and has now stopped working all together I done the camera test and I could see it flashing so can you guide me into what could be wrong please
I am awaiting new key
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Old Nov 27, 2016 | 07:42 PM
  #55  
alecs20's Avatar
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E 500 Wagon
Anyone here can help me out with coil inductor from inside the key?
I tried looking online but cannot find without the key...
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Old Dec 5, 2016 | 06:07 AM
  #56  
ZimC180K's Avatar
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From: Harare, Zimbabwe
2006 E320CDI
Thanks!

Read through this and helped so much in fixing my key that suddenly stopped working (still opening doors but not being recognized in ignition).

Opened up the key and noticed that the coil had come adrift. After opening my other key to get an idea of how it was supposed to be and looking at the pics on the thread I tried some careful soldering (I am a novice and know it is not neat!) managed to get it back on the board and now working!!!

New keys in Zimbabwe are US$ 370 from the Dealership and take 2 to 7 weeks to get - really appreciate all of your help

Attached are some pics of mine.
Attached Thumbnails Key unlocks doors but wont start car-20161204_145124.jpg   Key unlocks doors but wont start car-20161204_145346.jpg   Key unlocks doors but wont start car-20161204_145352.jpg   Key unlocks doors but wont start car-20161204_145359.jpg  
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Old Nov 4, 2023 | 04:18 PM
  #57  
convicted's Avatar
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1998 CLK 320
Lightbulb

Originally Posted by Glyn M Ruck
Guys - Just so you understand the inductively energised key, handshake & start process.










That is a brilliant illustration. Thank you for that. I have a "no crank, no start" issue, which I'm struggling with (likely BAS/ESP module, possibly combined with wheel speed sensor). Assuming you're still active on here, I'd humbly ask for your opinion regarding troubleshooting. Thanks!
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