Not the neutral safety switch!

1986-1995 : 200TD, 200CE, E200, 260E, 300E 2.6, 300E 2.8, 300E, E320, 400E, E420, 500E, E500, 300CE, E320, 230TE, 300TE, 300D 2.5 TURBO, E300 DIESEL, 300TD, 300E 4MATIC, 300TE 4MATIC, E36 AMG
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Charlie Buckett
C Class
Posts: 48
Joined: Sun 13 Sep, 2015 1:44 pm
Model you own: w124
Location: Victoria/Australia

Not the neutral safety switch!

Post by Charlie Buckett » Fri 01 Sep, 2017 7:39 pm

So I have been starting my car in neutral for months (actually had to align gearstick just above neutral).
Then it finally didn't start one day, so I figured neutral safety had finally packed it in.
So I bumped the starter and got her home.
Ordered new NSS (made in Germany - Trucktec Automotive?).
I aligned it with the allen key guide.
Car still did not start.
I aligned it evey other way. Never started, But the reverse lights always worked even if misaligned!

The headlights dont dim when I attempt to crank
There is no noise from starter
Ignition isn't wobbly.
I know nothing about electrics (mechanics more my thing) barely know how to use a multi meter.
Any help? Thanks

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MercMad West Australian
450 SEL 6.9
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Joined: Sun 08 Dec, 2013 2:23 pm
Model you own: I own multiple different models
Location: Perth

Re: Not the neutral safety switch!

Post by MercMad West Australian » Fri 01 Sep, 2017 9:53 pm

are you sure its not your shifter handle linkage bushings disintegrated ?

is the knob floppy or stiff in its clicking into positions? If it is flopping around your bushings are flogged out / gone.
MMWA

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Ivanerrol
Mercedes Demigod
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Joined: Sat 12 May, 2007 3:21 pm
Model you own: w204
Location: Melbourne

Re: Not the neutral safety switch!

Post by Ivanerrol » Fri 01 Sep, 2017 11:45 pm

This is what MMWA is talking about.
There are two.
Image
W211 - E240
W204 - C280
W202 - C180
W210 - E240
Departed
W202 - C200
W202 - C180 - On consignment to nephew
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

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Charlie Buckett
C Class
Posts: 48
Joined: Sun 13 Sep, 2015 1:44 pm
Model you own: w124
Location: Victoria/Australia

Re: Not the neutral safety switch!

Post by Charlie Buckett » Sat 02 Sep, 2017 11:27 am

Yeah thanks guys, I replaced both those bushings not long back.
I suppose it must be solenoid or ignition but I dont know how to test.
If it was the solenoid would I still be able to bump the starter? (I'm doing that off some plug above the battery, I don't even know what it is, electrics confuse my noggin).
Confusing the reverse lights come on even when misaligned, but I have it aligned perfectly with the allen key guide hole.
I'm starting to think I got a dodgy NSS, I bought it for $74, but it's made in Germany so I thought it would be good (Trucktec).

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Ivanerrol
Mercedes Demigod
Posts: 5533
Joined: Sat 12 May, 2007 3:21 pm
Model you own: w204
Location: Melbourne

Re: Not the neutral safety switch!

Post by Ivanerrol » Sun 03 Sep, 2017 12:22 am

Trucktec - dare I say it ....possibly less than reliable.
Some of their parts are made in ???????? butt boxed in Germany
W211 - E240
W204 - C280
W202 - C180
W210 - E240
Departed
W202 - C200
W202 - C180 - On consignment to nephew
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

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Charlie Buckett
C Class
Posts: 48
Joined: Sun 13 Sep, 2015 1:44 pm
Model you own: w124
Location: Victoria/Australia

Re: Not the neutral safety switch!

Post by Charlie Buckett » Sun 03 Sep, 2017 2:34 pm

Darn, but could it possibly arrive not working, as opposed to not lasting long?
I can't think of any way to determine if the new switch is a dud (except buying a more expensive one).

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Tony From West Oz
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Joined: Mon 20 Jun, 2005 10:04 pm
Model you own: w202
Location: Bedfordale WA

Re: Not the neutral safety switch!

Post by Tony From West Oz » Sun 03 Sep, 2017 2:46 pm

Charlie, To test the NSS.

Tools:
Multimeter (with buzzer on ohms range preferably) - A test lamp and suitable connectors would suffice if you do not have a Multimeter.

Method:
Disconnect the NSS wiring connector. Identify the starter lockout contacts of the NSS and have an accomplice move the gear selector between P, R, N and D in turn to see if the contacts close. Repeat for Reverse light contacts.
Alternatively, remove it from the vehicle and test it on the bench.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (occasional tourer)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

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Charlie Buckett
C Class
Posts: 48
Joined: Sun 13 Sep, 2015 1:44 pm
Model you own: w124
Location: Victoria/Australia

Re: Not the neutral safety switch!

Post by Charlie Buckett » Sun 03 Sep, 2017 3:55 pm

Thanks heaps I 'll test that a.s.a.p

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Charlie Buckett
C Class
Posts: 48
Joined: Sun 13 Sep, 2015 1:44 pm
Model you own: w124
Location: Victoria/Australia

Re: Not the neutral safety switch!

Post by Charlie Buckett » Sun 03 Sep, 2017 4:11 pm

I tested the old one that was playing up.. and on the reverse light contacts I get 1 beep as I move the selector through the range.
On the other set of contact I get 2 beeps as I move the selector through the range. (not sure if there should be 4 beeps?)
I will test the new one which is on the car tomorrow.
I really appreciate this info. Thanks.

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Tony From West Oz
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Posts: 3082
Joined: Mon 20 Jun, 2005 10:04 pm
Model you own: w202
Location: Bedfordale WA

Re: Not the neutral safety switch!

Post by Tony From West Oz » Sun 03 Sep, 2017 9:57 pm

The old one sounds like it is working correctly. The Reverse contacts beep should not occur in the same place as the starting contacts beep, but should be between the 2 starting contact beeps. Is that beepingly clear? ;)
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (occasional tourer)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

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