Unique Problem Now That It Is Cold Here in GA - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 01-08-2014, 07:01 AM Thread Starter
BenzWorld Junior Member
 
Date registered: Apr 2007
Posts: 7
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Unique Problem Now That It Is Cold Here in GA

I go to the car, a 2004 Mercedes C240 4Matic, and use the unlock button on my fob. Works fine.

Put the key fob in the ignition. The car lights up with the odometer showing the miles and the park key on the red dot.

Turn the key to the on position and the dash lights up.

I twist to start it up and... nothing.

The dashboard instrument display stays on. It's almost as if the car is acknowledging the key in the ignition. But not the key actually turning to start up the vehicle.

Any help with this would be most welcome. Thanks, and I hope you have a warm week ahead.
macarose is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 01-08-2014, 07:12 AM
BenzWorld Elite
 
JN74SL's Avatar
 
Date registered: Apr 2013
Vehicle: Monika '74 450SL and her lil sis BrownHilda '79 280SL
Location: Red Lion, Pa
Posts: 1,695
Mentioned: 15 Post(s)
Quoted: 215 Post(s)
Weak battery?

How bright are the headlights?
The cold can kill a battery pretty quickly

Current:
Reggie 2010 Range Rover Sport Supercharged
Monika '74 450 SL
BrownHilda '79 280 SL ex-Zender
Scarlett 2014 Jeep Cherokee 4wd
FoxyCleopatra '99 Chevy Suburban
Krystal 2004 Volvo S60
Gone:
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'06 Volvo S60 AWD turbo
'97 Jeep GC
'96 Volvo 960
'96 Impala SS
'92 Subaru Legacy wagon
'74 Jeep CJ5
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad
JN74SL is offline  
post #3 of 8 (permalink) Old 01-08-2014, 07:39 AM
BenzWorld Elite
 
Diesel Benz's Avatar
 
Date registered: Dec 2005
Vehicle: 222.132 & 221.122 & 212.025 & 906.633
Location: Europe
Posts: 10,322
Mentioned: 3 Post(s)
Quoted: 34 Post(s)
Quote:
Originally Posted by macarose View Post
I twist to start it up and... nothing.

The dashboard instrument display stays on. It's almost as if the car is acknowledging the key in the ignition. But not the key actually turning to start up the vehicle.
You twist the key but nothing happens, does it mean the key does not turn in the ignition slot at all?

Do you have a spare key, does it behave the same way?

Depending on the actual key behaviour it could be a broken key (most often the coil that picks up power from the ignition slot loosing solder contact to the circuit board, or broken coil, you can try to press the "open door locks" button and then immediately try to turn the key), it could be the ignition slot (EIS), the electronic steering lock or if the key actually turns it could be the starter relay, the starter solenoid or the starter itself, or a starter fuse or...
Diesel Benz is offline  
post #4 of 8 (permalink) Old 01-08-2014, 07:41 AM Thread Starter
BenzWorld Junior Member
 
Date registered: Apr 2007
Posts: 7
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
It does turn. The dash stays the same as if the car is not reading the fob. All the doors open and lock and the alarm works as well. I may just use a battery and see if that helps the cause.
macarose is offline  
post #5 of 8 (permalink) Old 01-08-2014, 07:53 AM
BenzWorld Elite
 
Diesel Benz's Avatar
 
Date registered: Dec 2005
Vehicle: 222.132 & 221.122 & 212.025 & 906.633
Location: Europe
Posts: 10,322
Mentioned: 3 Post(s)
Quoted: 34 Post(s)
Quote:
Originally Posted by macarose View Post
It does turn. The dash stays the same as if the car is not reading the fob. All the doors open and lock and the alarm works as well. I may just use a battery and see if that helps the cause.
The key should be fine then. You could measure the battery voltage but it is probably something different. On a 203 the fuse for the starter battery may blow if the starter is at end of life. Check from the starter relay if it has voltage and if it has, check the starter solenoid signal pin, check ground wires too.

If you listen carefully, can you hear the small starter relay engage at the fuse box (not the big starter solenoid)?
Diesel Benz is offline  
post #6 of 8 (permalink) Old 01-08-2014, 08:13 AM Thread Starter
BenzWorld Junior Member
 
Date registered: Apr 2007
Posts: 7
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Gonna do that right now. Thanks!
macarose is offline  
post #7 of 8 (permalink) Old 01-08-2014, 08:21 AM
Outstanding Contributor
 
keyhole's Avatar
 
Date registered: Sep 2006
Vehicle: 2004 CLK 240 Coupe
Location: Norfolk. UK
Posts: 10,450
Mentioned: 10 Post(s)
Quoted: 356 Post(s)
(Some of my reply has been already said above, while I was drafting this post - however I have left it in.)

From your report, quite a lot is working OK. (assuming that the battery is up to scratch, as suggested above) You also mean that the car is not Cranking, I assume? Starting is when the engine runs.

1. Ignition key turns from posn 0 to posn 'Start' means that the key is OK, ignition switch is OK, steering lock is OK, DAS is OK (drive authorization system)

2. That means that you have 'permission to start'.

Turning the switch to the Start position should energise the Starter relay (N10/1 kS) located in the engine bay, which in turn will energise the Starter solenoid, located on the starter unit. You should be able to hear both relays click when the key is turned to Start.

If no 'click', try replacing the Starter relay. I would remove the relay case and inspect the contacts inside. For an emergency you can burnish damaged contacts with fine emery paper, just to get yourself moving again.

Other possibilities.

3. There is also a fuse 52 (15A) in the starter (M4) circuit. Check that out.
4. The starter could be toast - or maybe it has jammed and blown fuse 52. Sometimes a smart blow to the case with a mallet can free it up! If all else is OK, try that...
keyhole is online now  
post #8 of 8 (permalink) Old 01-08-2014, 10:48 AM
BenzWorld Member
 
Date registered: Mar 2012
Vehicle: 2010 B200
Location: Toronto
Posts: 198
Mentioned: 0 Post(s)
Quoted: 13 Post(s)
with the wind chill warning of -30 to -40F, I left my battery charger on overnight, trickle charge/tender charge and it starts fine. Battery was at 35-45% at 0F so charging battery to 100% helps everything

oyster is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome