Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-28-2021, 10:50 PM
Registered User
 
Join Date: Mar 2021
Posts: 4
W123 300D Strange No Start Issue

Having a strange issue with my 1984 300D with a 4 speed manual swap. I did a manual crank window conversion on the car, and afterward drove the car with no issue to oreilly. Car started fine and drove fine with no issues. When I go to leave the store, the car would not crank whatsoever. Turn the key to run with no response. When the key is turned back to the off position and removed, all of the lights on the instrument cluster remain on; blinker lights, battery light, brake pad wear light, seatbelt light. Have to remove battery cable to get them to turn off. The only change is when the key is turned from "off" to "run", the battery light turns off, and when switched back to "off" the light comes back on.

I figured it may be an issue with the ignition switch, so i installed a brand new one from Mercedes and the issue still remains. I've checked over the wiring and do not see anything out of place. Fuses all check out too. Battery also checks out. The ignition assembly itself appeared to also be in good shape, the wings on the back side were intact and it functioned fine. Again, the car makes not attempt to crank whatsoever. Pop started it to get home and has sat since.

Any help on where to look or how to go about this would be greatly appreciated!

Reply With Quote
  #2  
Old 03-29-2021, 12:30 PM
Registered User
 
Join Date: Feb 2020
Location: Texas USA
Posts: 125
sounds to me as if there is a short in the charging system or you have a stuck relay

inspect the wiring going into the alternator carefully

if no damage, I would pull the glow plug relay and see if it will try to start
Reply With Quote
  #3  
Old 03-29-2021, 12:54 PM
Senior Member
 
Join Date: Nov 2002
Posts: 771
there's a tab on the steering lock assembly that breaks off. the lock cyl engages the column lock which then engages the ignition switch. i had 1 like this this past summer. pull the ign. sw. and look for loose pot metal. this 1 needed the column lock assy., which is nla. had to go used. it is possible the lock cyl has broken like that but not likely.
Reply With Quote
  #4  
Old 04-05-2021, 07:28 PM
Registered User
 
Join Date: Mar 2021
Posts: 4
Quote:
Originally Posted by jsb357 View Post
sounds to me as if there is a short in the charging system or you have a stuck relay

inspect the wiring going into the alternator carefully

if no damage, I would pull the glow plug relay and see if it will try to start
Which relay would you check if it were you?
Reply With Quote
  #5  
Old 04-05-2021, 07:30 PM
Registered User
 
Join Date: Mar 2021
Posts: 4
Quote:
Originally Posted by porkface View Post
there's a tab on the steering lock assembly that breaks off. the lock cyl engages the column lock which then engages the ignition switch. i had 1 like this this past summer. pull the ign. sw. and look for loose pot metal. this 1 needed the column lock assy., which is nla. had to go used. it is possible the lock cyl has broken like that but not likely.
When I pulled the ignition assembly, it looked really good, the small wings on the back side were perfect and everything seemed to work well. Maybe I missed something but I should probably replace the entire thing, i installed a new switch from Mercedes but not the whole ignition lock assembly iteslf.
Reply With Quote
  #6  
Old 04-19-2021, 08:10 PM
Registered User
 
Join Date: Mar 2021
Posts: 4
To update this it ended up being the engine ground strap. The one that goes from the transmission bell housing to the frame rail on the driver side. Replaced with one from junkyard, started right up no problem.
Reply With Quote
  #7  
Old 04-29-2021, 03:13 PM
Diesel Preferred
 
Join Date: Oct 2007
Location: Charleston SC
Posts: 2,771
Quote:
Originally Posted by clayholz View Post
To update this it ended up being the engine ground strap. The one that goes from the transmission bell housing to the frame rail on the driver side. Replaced with one from junkyard, started right up no problem.

Nice! How did you diagnose that?

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 08:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page