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#1
07-17-2011, 12:21 PM
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NSS does not lockout-starts in any gear, no reverse light
Is that a bad NSS or is there an adjustment which may fix the problem? 83 300D turbo.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked 
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#2
07-17-2011, 12:25 PM
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Did someone jump the NSS switch?
__________________
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
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#3
07-17-2011, 12:39 PM
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Funola have a look in the 722.3 ATSG manual - may be there is a bit of information there... you do have access to that don't you?
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#4
07-17-2011, 01:22 PM
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Sounds like a bad/jumpered NSS. I posted schematics of the pre-/post- 81 NSS in this thread: Neutral Safety Switch Wiring Question
Post 11. Depending on which version of the schematics you have, you can get a different level of detail on how things work. Post 4 is also correct, but doesn't show the back-up light wiring, nor the kickdown switch - also on the circuit, but maybe not actually part of the NSS. It could affect the back-up lights since they share a power line. What happens when you try to start it in D or R? Does the tranny engage and try to roll the car?
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#5
07-17-2011, 02:23 PM
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NSS used to work a long time ago incl reverse light. Then shift lever became looser an looser till it was always in forward gear and I cannot select reverse gear. That was due to a missing bolt on the shifter rod at the transmission. I have replaced that missing bolt and can now select all gears incl park but still have no nss lockout or reverse light (note: I also did not have nss lockout before I replaced missing shifter bolt).
If I start in drive or rev, the car moves so I always have parking brakes engaged when starting. Army, got a link? Thx!.
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#6
07-18-2011, 02:02 PM
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Just behind the shift lever on the NSS is a piece of plastic that fits in to a hole in the shift lever and is what moves the switch mechanism when you shift gears. If the little nub that fits in the hole on the shift lever gets broken off or, in your case, where the shift lever became loose and it possibly comes out of the hole, the NSS won't do it's thing.
I would check to make sure that the plastic piece that does the switching is still being moved by the shift lever. See here where the shift arm from the transmission comes through the NSS. The black plastic piece is the one to check. http://catalog.peachparts.com/ShopByVehicle.epc?q=1981-Mercedes--Benz-300td-Transmission&yearid=1981%40%401981&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6230%3AED|10000135%3AMBC|1518%40%40300TD&catid=241185%40%40Transmission&subcatid=241298@@Neutral+Safety+Switch&mode=PD
__________________
 1981 300TD "The Green Lantern" 1980 300TD 1983 300D Euro "China Cat"
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