CClass W203 sometimes doesnt start

Discussion in 'Electronics' started by W203AL, Jan 12, 2014.

  1. W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Hello,

    I have a problem with my mercedes.

    The car is a W203 2004 automatic 220cdi.

    For the past month more than in 1 occasion I cant start the car.

    When i insert the key i hear the ELV, then i open the ignition to position II i hear a "bzzzz" from the engine bay , when i try to start the car nothing happens at all! I switch the key to position III and it's dead,, no response at all!

    The battery is brand new (i replaced it thinking it was the battery). When i turn the key to position II i see that the panel gives me random errors like ESP not working and Coolant System not working... then 2 out of 3 times that i tried the car would start if connected to the battery of another running car... while another time it just started without me doing anything... and whenever i manage to start it all the error codes are gonne and the car is 100% fine...

    This is making my car unreliable and i cant drive out of town as i fear i will get stuck somewhere if i turn off the car :(((

    HELP :(((
     
  2. grumpyoldgit

    grumpyoldgit Hardcore MB Enthusiast

    Messages:
    2,604
    Joined:
    May 7, 2012
    Location:
    Stourbridge
    Car:
    C270CDI Avantgarde SE
    Find a good independent MB specialist garage who has a STAR diagnostic machine and get it diagnosed.

    If you say where you are located someone may be able to recommend an indie garage.
     
  3. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Hi again,

    Thank you for taking the time to help me out

    I had it diagnosed with STAR and most of the times the computer says it can't connect with the EZS ... then without doing anything... it manages to connect after a few trials and the only errors and faults i get are the Radio (which doesnt work because it has gone in safe mode because of disconnecting the battery) and an air conditioner issue.

    All the other errors that appear in the panel when the car doesn't start are not there anymore (in the panel and in the Star test).

    So when it does connect to the EZS it actually shows no relevant faults connected to this issue...

    Regarding the key i had it checked at a electronic key specialist and he said the key is fine... its either the sensor or the program (according to him) but this is not sth that bothers me that much... the big trouble is the starting/not starting issue...

    Once again thank you for your time and looking forward to your thoughts after the info above...
     
  4. Lyserman

    Lyserman Hardcore MB Enthusiast

    Messages:
    582
    Joined:
    Apr 17, 2013
    Location:
    Taunton
    Car:
    Shanks's Pony (for now)
    I had a very similar issue on mine and when I took off the starter motor I found this:
    [​IMG]

    It was caused by the nut not being tightened up properly and sometimes would make contact and sometimes not.
    A new nut and cleaning up the corrosion cured it on mine with no problems since.
    It may be worthwhile getting yours checked.
    Tony
     
    1 person likes this.
  5. grumpyoldgit

    grumpyoldgit Hardcore MB Enthusiast

    Messages:
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    Joined:
    May 7, 2012
    Location:
    Stourbridge
    Car:
    C270CDI Avantgarde SE
    ^ +1

    After reading your additional info, it does sound like a loose electrical contact somewhere.
    Luckily I've not had any similar problems, but the above post by Tony (Lyserman) could well be the same as yours. Good luck and hope it is the same problem, with an easy fix.
     
  6. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Wow... thanks i will definitely check the motor starter after reading your comment.

    Did you have the same symptoms that i am experiencing? This looks like a cheap fix... i really hope its just this and the problem gets solved as I am currently not using the car for out of town driving...

    Will check the motor starter and update you guys on the outcome...

    Once again thanks for the help...
     
  7. Lyserman

    Lyserman Hardcore MB Enthusiast

    Messages:
    582
    Joined:
    Apr 17, 2013
    Location:
    Taunton
    Car:
    Shanks's Pony (for now)
    Symptoms I had were put key in, heard the usual buzzes and sometimes when I put the key to the start position, nothing.
    The loose bolt is the feed to the solenoid which engages the starter and sometimes there was enough resistence to prevent the power getting to where it needed to be.
    Since I cleaned it all up 9 months ago the problem has never re-appeared.
    Fingers crossed it is the same cheap fix for you.
     
  8. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Hi. I will check the motor starter this week because i think that what you suggest makes perfect sense.

    Although this doesnt explain why would STAR not connect to the EZS sometimes and why does it connect only randomly after a few trials... which leads me to problems with the front SAM or sth else....

    Do you think the lock/unlock issue is unrelated and i am mixing two different problems?

    Thanks
     
  9. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    I had the solenoid replaced today... didnt look as bad as the one in the picture but i replaced it with a new one... I hope i wont have the same problem again :) ill wait and see... thanks for the help guys
     
  10. Rory

    Rory MB Club Veteran

    Messages:
    7,253
    Joined:
    Mar 12, 2005
    Location:
    Cheshire, UK
    Car:
    C270CDi Estate (late 2004 facelift model)
    Is EZS the same as EIS (Electronic Ignition Switch)?

    Sorry if this is a bum steer as I'm not sure if failure could produce the problems you're getting, but they are known weak spot. You hear of people blasting them with hair-dryers to get the car going as the solder joints crack.
     
  11. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Well... it happened again therefore i can say its not the motor starter... i am left with no other as to check the Fuse Box (Front SAM) as you suggest for the solder joints ... i dont know what else to do this is getting annoying...

    Is there any problem to replace the whole fusebox? does it need reprograming of anything ??

    Additional info that might help is that 100% of the cases i am able to start the car if i connect the battery to another car's battery while their car is running... so if i jump start it then it is all fine, starts and the problem doesnt repeat itslef for another week or so... what can it be since jump starting works always... ????
     
    Last edited: Feb 14, 2014
  12. OP
    OP
    W203AL

    W203AL New Member

    Messages:
    12
    Joined:
    Jan 12, 2014
    Car:
    C-Class W203 2004
    Ok... now i have a pattern... I can provoke this problem by turning off the car and locking it while the Hazard flashers are ON... if i leave it like that for a while the car will not start and requires a jump start... what does this tell me ? :O
     
  13. blitzmaster

    blitzmaster New Member

    Messages:
    1
    Joined:
    Feb 15, 2015
    Car:
    w203
    Hi W203 AL
    I am very interested if you have solved this problem with yours car because I have the same problem for quite some time with my w203
    hope that you did so I don't wonder no more
     

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