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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-09-2013, 05:06 PM
Registered User
 
Join Date: Apr 2013
Location: Corbett, Oregon
Posts: 70
78 300d

Hello, my sweet little car won't start. Drove fine today, I've been running errand all morning. Pick my son up from school and nothing! Thought maybe battery-got a jump, nothing. Have power to dash, windows and such. Turn the key and click, that's it.. Has been a good car so far.



78 300d
87 300td wagon

Reply With Quote
  #2  
Old 09-09-2013, 05:13 PM
Registered User
 
Join Date: Dec 2005
Location: Carson City, NV
Posts: 3,790
Start by cleaning battery connections and inspecting the cables and the connections at the starter. If those check out it's pretty likely that your starter is going bad. Tapping on it before trying to start will sometimes get it to work a few more times before it give up altogether.
__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 367,xxx miles
08 Triumph Street Triple 30,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, EBC HH brake pads, otherwise stock.
88 Jaguar XJS V12 93,xxx miles. I should be in the garage now.
Reply With Quote
  #3  
Old 09-09-2013, 05:27 PM
Registered User
 
Join Date: Apr 2013
Location: Corbett, Oregon
Posts: 70
ok, I will clean and check..if it is the starter, is that an easy replacement? I have a hard time getting to it from the top. I was trying to see the connection but couldn't. felt around a bit, haha. the car is old and sat for sometime. I have been driving it about 3 months. if the connection are bad but not the starter how do I determine this?
Reply With Quote
  #4  
Old 09-09-2013, 05:40 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Jump terminal 1 and 3 in the junction box on the top of the passenger inner fender in front of the battery and see if it turns over.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #5  
Old 09-09-2013, 05:59 PM
Registered User
 
Join Date: Dec 2005
Location: Carson City, NV
Posts: 3,790
If the connections are corroded, dirty, or otherwise nasty looking, they are suspect. A good cleaning will reduce resistance and allow proper current flow.

Starter changes aren't terribly tough. I did my 240D twice. The first time took over an hour, the second time about half as long. The 300D should be similar.
__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 367,xxx miles
08 Triumph Street Triple 30,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, EBC HH brake pads, otherwise stock.
88 Jaguar XJS V12 93,xxx miles. I should be in the garage now.
Reply With Quote
  #6  
Old 09-09-2013, 06:14 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
A 78 doesn't have the terminal box on the fender.....you have to jump it at the starter...

How old is the battery?

I would take the battery into the local auto store and have it tested and charged....if it sat with that battery init....they go bad....

Did the battery light come on, that is on the dash before you start the car? And did it go off?

Getting to the starter in a non turbo is easy.....remove the air cleaner and you can get to the terminals....remove the battery tray and you get even more room for removal..
__________________
Reply With Quote
  #7  
Old 09-09-2013, 10:35 PM
Registered User
 
Join Date: Apr 2013
Location: Corbett, Oregon
Posts: 70
had it towed home, and she started right up. tried again, nothing.. will clean battery and check connections, what else? where is the neutral safety switch and can connection problems with that be causing this bull****?
Reply With Quote
  #8  
Old 09-09-2013, 10:39 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
put the shifter in Neutral... or try pushing the shifter all the way forward in park with your left hand try to start it...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #9  
Old 09-09-2013, 11:15 PM
Registered User
 
Join Date: Apr 2013
Location: Corbett, Oregon
Posts: 70
I already tried that..no change.
Reply With Quote
  #10  
Old 09-09-2013, 11:46 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
OK, and you get a click when you try to start?

then it's unlikely to be the NSS, that leaves, battery terminal condition, cable condition, or wiring at the starter... the battery is the most likely, as without some SERIOUS jumper cables, starting a diesel is impossible with a dead battery. pull the battery out, and take it to an auto parts store for testing. if it tests good, clean the terminals, and the cables for perfect connection. then try it again. next check the other ends of the cables, make sure they are clean and tight, last would be the starter itself, and no... it's NOT easy changing the starter on these cars... especially in the snow belt salt road area you live in... them bolts are big, tight and nearly impossible to get to...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #11  
Old 09-09-2013, 11:47 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
Could very well be the nss but to could be a bad spot on the commuter in the starter....the tow and pushing probably got the brushes to touch the sweet spot.....but it could be bad shifter bushing and/or nss.....as was said though, usually a nss or bushing you wouldn't hear a click....
__________________
Reply With Quote
  #12  
Old 09-10-2013, 12:23 AM
ROLLGUY's Avatar
ROLLGUY
 
Join Date: Oct 2007
Posts: 6,819
Don't forget to check the ground strap from the transmission bolt to the chassis. If it is loose, it will cause intermittent starting.
Reply With Quote
  #13  
Old 09-10-2013, 12:46 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 34,915
If you have Time drop by a Harbor Freight Store and pic up one of the inexpensive Electrical Digital Multimeters. If you get the Car Started again see if you Battery is charging.

I don't know if your year and Model has the Neutral Safety Switch Connector located in the same spot as on the Turbo Models; see the pics.

In the 2nd pic it shows where to use a Jumper Wire to bypass the Neutral Safety Switch.
I don't know if your Wires are the same Color or not but one set of wires goes to the Neutral Safety and the other set goes to the Back Up Lights.

In the last 1.5 Years People have been having issues with their Steering Colum Lock (that turns the Ignition Switch) and the Ignition Switch itself.

While it was still working in the Pic of the Ignition Switch the Contact Point on one side is burned off. In My case it was the inside of the Steering Colum Lock the tube that turns the Ignition Switch broke.
I replaced the whole assembly and it comes with a New Ignition Switch and Vacuum Shutoff Valve when you get the steering Colum Lock.

There is an Engine to Chassis Ground Strap under the Car about where your Feet Rest that could be checked along with where the + Cable bolts to the Starter.

The Starter is similar in design and function to the old AC Delco Starters that used to be on all GM Cars.
Attached Thumbnails
78 300d-neutral-safety-switch-connector-1.jpg   78 300d-neutral-safety-switch-connector-2-sep-13.jpg   78 300d-ignition-switch-burned-contact-blow-up-sep-13.jpg  
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #14  
Old 09-10-2013, 02:43 AM
cfh cfh is online now
Charlie
 
Join Date: Sep 2007
Location: DFW, Texas
Posts: 194
I had the same problem with a 300d (turbo) a few years back; it was a corroded ground strap - very easy to fix - just unbolted the ground strap at the frame, cleaned it up with a little sand-paper, oiled it, bolted it back up. - Ch

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 07:01 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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