Bad Starter Solenoid? 300SD 1982 - PeachParts Mercedes-Benz Forum

LNGfish · #1 08-28-2009, 05:12 PM

Engine will not turn over. Charged battery but battery was OK since charger stop charging after 10 min. Plus battery is 6 weeks old.

Dash Light fine, radio fine, Glow plugs working as usual.

I guess I'll have to pull starter unless U guys have any other suggestions like a relay or fuse somewhere. The cars parked on gravel so I dread doing it there, yuck!

Thanks!

LNGfish · #2 08-28-2009, 05:14 PM

Battery Voltage 12.44 volts with all key on. When Key to crank, voltage dropped to 11.44 Volts with things that clicked just once; "not a chattering".

LNGfish · #3 08-28-2009, 05:59 PM

I put the shift lever in Neutral and it started fine. Anybody know where I need to look for this problem?

Is there a Park Safety Switch on the Trannie and if so where is it?

PS Atleast I didn't have to pull the starter!!

LNGfish · #4 08-28-2009, 06:09 PM

Finding info here using Search function. NSS .

Just freeked when I did not start and I need to go somewhere.

Heck sorry!

compress ignite · #5 08-28-2009, 06:46 PM

1st picture is your NSS (Neutral Safety Switch)
2nd is one of your shifter linkage Bushings.

Don't condemn your NSS (Although I agree with you the symptom fits) until
you check the shifter bushings.

Diesel911 · #6 08-29-2009, 03:00 AM

Your SD may not have this but on 123s there is a Terminal Block with three screws on the Fender Well in front of the Battery.
If yours has this this is were the Manual tells you can hook up a remote starter Button.
If you look closely (or use your Voltmeter) 2 of the screws screw into the same copper strip and get (+) Batter Voltage. To the right is a plastic divider and another Screw. That part has a wire that goes to the Starter Solenoid.

If you Starter Cranks while jumping across those terminals you do not have a Solenoid problem.

kmaysob · #7 08-29-2009, 03:09 AM

check the shifter bushing. if they are fine, start looking at the nss.

LNGfish · #8 08-29-2009, 09:49 AM

Thanks so much for the follow-ups yesterday and today,

Today I'm going to put the car on ramps and look around to try to find the NSS and the Shifter Link Bushing(s).

1)That Shifter Link Bushing in Picture looks like it is threaded into something, this will help me for when I look. I'm curious if it threads in the Transmission and how many bushings there are. Anybody know?

I had earlier replaced some bushing(s) in the shift rod but it/they were just bushings with no threads on them. Sort of out away from trannie a bit.

2)Is the NSS the switch that has to be made ie "Closed" when the shift lever is in PARK?

2A)Just wondering why they don't call it a Park Safety Switch since my mind gets confused knowing it "Starts" in Neutral with "possibly" the NSS being bad.

Anyway yesterday after I got it to start in neutral when it would not start in Park and restarted in maybe 6-8 times and then it would start in Park, so now the problem went away but I'm sure it's something going bad and I'll look.

4)Is this telling me anything than before?

Yeah I'm glad I got it to start with help of this site. You folks are great!.

I help where I can when I read others problems. Thanks again.

kmaysob · #9 08-29-2009, 12:02 PM

we were talking about the bushings on the shift rod. did you inspect or replace both of them?

yes the nss should allow the car to start in neutral. thats considered out of gear.

LNGfish · #10 08-29-2009, 12:25 PM

I looked at the (2) bushings. They are shot, I will order and replace them. Thanks for all the help. The NSS looked a bit difficult to remove so I'll start with the bushings.

Yes I see 2 bushings on the shaft about 2 feet apart under the car connected to the Input lever.

LNGfish · #11 08-29-2009, 12:32 PM

Kmaysob,

I'd like to get this clear in my head. Is the purpose of the NSS to allow to start car in Neutral?

I'm so used to a switch with this function to be called a PARK safety swith.

All along I've thought this NSS should be called a Park Safety Switch but I may be wrong.

The more I think about it the more I get confused.

Anyway I'll do the bushings so I don't have to worry how it works, I'll forget anyway.

Thanks again!

kmaysob · #12 08-29-2009, 01:48 PM

the purpose of the nss is to keep it from starting in gear. park is the same as neutral, the only difference is that there is a pin in the transmission that locks everything from moving.

without this switch, you could start it in gear and have a dangerous situation.

LNGfish · #13 08-29-2009, 02:13 PM

Gotcha Kaymaysob !

I found the bushings at Fast Lane will order next week. The bushings I'll be ordering are straight sided stepped twice not threaded like the other fellow posted a picture of a few posts back. Maybe a different model.

I'm planning on ordering: W0133-1642114 ( this look like the right ones?)

I'll get 2 one for each end of the Rod. Thanks for looking!

Steve

compress ignite · #14 08-29-2009, 05:27 PM

'Bushing in earlier picture is from Fastlane's catalog picture for your chassis and
year model(The picture is somewhat difficult to discern).
The Bushings will FIGHT your installation efforts(They have to be a TIGHT fit!)
Before you try to force them into the FLAT shifter lever ,soak them in hot water
for five minutes or so to make them more Pliable.[Be careful of the "CLIPS" that
secure the rod ,They LOVE to jump into another space/time Warp]
There is a simple use of a bolt and washers with a small socket to install that
diesel giant has on his website...you could easily make your own.
(There is a very expensive set of pliers made for this job...?)

I wouldn't use any Silicone or Mineral based Lubricants for this Job!
(Maybe water soluble KY)

Your trannny setup has more than one set of Bushings and locations:
http://catalog.peachparts.com/ShopByVehicle.epc?q=1982-Mercedes--Benz-300sd-Transmission&yearid=1982%40%401982&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6206%3AMBC|1510%3AED|10000134%40%40300SD&catid=241185%40%40Transmission&subcatid=241303@@AT+Shift+Linkage+Bushing&mode=PA

These are the ones that usually wear out fastest:

LNGfish · #15 08-30-2009, 10:28 AM

Thanks for reply:

I had thought I needed (2) WO133-1642114 yesterday but today that link shows (3) others it could be. So I sent an email to Roy. Thanks for the instructions about soaking the one up front, much appreciated. The reason I can't just match up to the website is the ones in there are home-made and not OEM. Thanks for assistance.