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Reggie Campbell Posted on Apr 03, 2017

Key will not turn in 2002 S430

Key will not always turn when I first put the key in the ignition. If its cool or cold it may take 45 minutes to a hour to start my car. If its hot enough the key will work right away at times but not guaranteed. If I leave the key in the ignition I hear a few clicks like the key is trying to sync with the car and after the first few clicks it may take 10 to 20 mins for the key to lock into the ignition and be able to turn. And also some times several malfunction warnings come on but not everytime. Also not all components will work in the car like the car is only sending enough voltage to certain components. Any solutions? already changed the battery..

1 Answer

David Redbeard

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  • Contributor 32 Answers
  • Posted on Apr 07, 2017
David Redbeard
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Joined: Nov 18, 2015
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Just some suggestions.
Clean the end of your key and get an earbud and metho/alchol and clean the keyhole sensor.
Change the battery in your key.
Check the charge level on the battery. Recharge.
Check alternator charging.
climatecontrol diagnostic menu

To enter mode press "REST" for more than 5 seconds. Use the left & right Auto buttons to scroll.
standing
value code description
15 1 Inside Temperature
11 2 Outside Temperature
11 3 Left Heater Core Temperature
10 4 Right Heater Core Temperature
10 5 Evaporator Temperature
11 6 Engine Coolant Temperature
3 7 Refrigerant Pressure: displayed as 1.xx bar where xx is in the display
10 8 Refrigerant Temperature
0 9 Not Used
1.2 10 Blower Control Voltage: 6.0V
11 Emission Sensor: 2.4V
12 Sun Sensor: 4.1V
0 20 Control Current for Auxiliary Fan: 3.2mA (Is this value too low?)
0 21 Engine RPM: 44 => 4,400rpm
0 22 Vehicle Speed
0 23 Terminal 58d: 32 or 32% of Full Battery Charge
12.0 24 Battery Voltage: 13.3V
8 40 Software Status: 164
5 41 Hardware Status: 85
216 42 Variant Code 1st numerical value
14 43 Variant Code 2nd numerical value

50 Not assigned
51 Not assigned
52 Not assignd
60 Roof OPE/CLO
61 Left side air outlet, knurled wheel potentiometer Volts
62 Vacuum actuator 46, feedback potentiometer Volts
63 Center outlet, knurled wheel potentiometer Volts
64 Vacuum actuator 47, feedback potentiometer Volts
65 Right side air outlet, knurled wheel potentiometer Volts
66 Vacuum actuator 48, feedback potentiometer Volts

Item 63 is the input signal from the thumbwheel controlfor the center vent, and 64 is the feedback signal to the controller giving it the position of the vent flap. As you move the thumbwheel these values should continously vary from a minimum of roughly .7 to 4.5.

5 Related Answers

onyeredson

Paul W

  • 404 Answers
  • Posted on Jan 06, 2009

SOURCE: mercedes 1999 c200 key fob

Hello Haq!
Could it be the key just needs re-coding? maybe you are worrying to much as £177 would be about right as that would need coding etc., Try phoning your local Merc dealer or take the key and V5 to them for coding (Hopefully)
Good Luck!
Paul 'W'
Onyer~EDson(:0)~[><

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Anonymous

  • 408 Answers
  • Posted on Mar 23, 2009

SOURCE: ignition key won't turn lock ssembly

hi,seem your steering lock mechanism is defective,if you to try,remove your under dash,you can your steering lock, loose bolt in clamp,fine a small lock drill out,then you can turn your ignition switch,you can also remove the wiring in the back of steering lock,renew your lock mechanism,ty

fixitfranky

  • 4 Answers
  • Posted on Aug 01, 2009

SOURCE: Intermittent starting problems

I have similar problem with wife's B200. Am told it's the neutral/park sendor in the gearbox, which prevents car starting unless in park or neutral. Dealer wants AUD$1200 to remove gearbox to replace faulty switch sensor. Will update this website on repair outcomes.

Anonymous

  • 1 Answer
  • Posted on Feb 10, 2010

SOURCE: c240 mercedes key wont turn seems locked

I have a 2001 C240 with the same issue. I removed the positive battery cable from the battery and kept it off for 30 seconds then replaced it. Everything was reset and the key worked.

Anonymous

  • 1 Answer
  • Posted on Feb 08, 2011

SOURCE: i have a 2002 mercedes

The little circuit board inside the key is probably wet, pull the apart

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