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 11-01-2007, 08:25 AM
Shawn D.'s Avatar
Registered User
 
Join Date: Sep 2006
Location: Alpharetta, GA
Posts: 509
What's This Captive Nut For in W123 Interiors?

Y'all,

While doing the thorough cleaning of my 300td's interior, I removed the seats and noticed a hole in the carpet on the sill, a bit forward of where the lower end of the seat belt attaches. There's a captive nut underneath, in maybe a 10x1.25mm thread size. Thus, it's too small to make it an alternate location for the seat belt attachment point. I made a point to look for this "feature" in the W123s in the junkyard the last time I was there, and they all had this hole with the captive nut underneath. What is this for?

Thanks,
Shawn
Reply With Quote
  #2  
Old 11-01-2007, 08:39 AM
KAdams4458's Avatar
Mmm! Diesel!
 
Join Date: Apr 2007
Location: Snohomish, WA
Posts: 1,420
I've asked the same question before, and didn't find any kind of definitive answer. The best possibility is that something bolts there that may be related to the seat bracket on some models. If you figure out why it's really there, please share.
__________________
- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work


My '77 300D progress thread

Reply With Quote
  #3  
Old 11-01-2007, 09:54 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
I may have found the answer to that one. There was a Euro wagon at Pick N Pull, and it had great MB-Tex front seats. {which are now in my wagon } The passenger seat had a totally different base. The seat would adjust front and back on a slide, but it had no up and down adjustment capability. So the seat was fastened at 4 corners like a normal seat, but there was also a long bolt that attached the outside base of the seat to the side floor frame right next to the seat belt anchor point. Was a long sleeve bolt. So I assume that is also a possibility for the driver's seat.
I just had to replace the passenger seat bottom mechanicals with my old seat.
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #4  
Old 11-01-2007, 10:30 AM
Registered User
 
Join Date: Jan 2001
Location: Alexandria, Virginia
Posts: 5,442
Quote:
Originally Posted by Shawn D. View Post
Y'all,

While doing the thorough cleaning of my 300td's interior, I removed the seats and noticed a hole in the carpet on the sill, a bit forward of where the lower end of the seat belt attaches. There's a captive nut underneath, in maybe a 10x1.25mm thread size. Thus, it's too small to make it an alternate location for the seat belt attachment point. I made a point to look for this "feature" in the W123s in the junkyard the last time I was there, and they all had this hole with the captive nut underneath. What is this for?

Thanks,
Shawn
Both of my W123 240Ds have a long 6mm bolt, washer and spacer anchoring the front passenger seat's rear-leg to the sill. I presume it's because the tall passenger seat mounting legs don't have the same side-rigidity as the drivers seat gets from it's stacked fore & aft/height adjusters.

Happy Motoring, Mark
__________________
DrDKW
Reply With Quote
  #5  
Old 11-02-2007, 01:34 AM
Registered User
 
Join Date: Aug 2002
Location: NE Okla
Posts: 1,104
So, Mark, what you're saying is that the 240D front seats are not a mirror image set like the 300D. Of course the arm rest also figures in making the seats different, but in a different way. That is interesting news, as I have not had a 240D in the W123 chassis. Seems like it might limit the "swapability" when looking to upgrade front seats.
__________________
1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150
Reply With Quote
  #6  
Old 11-02-2007, 11:38 AM
Mustang_man298's Avatar
Man of the fire
 
Join Date: May 2006
Location: Shingletown,Ca
Posts: 941
Quote:
Originally Posted by Lycoming-8 View Post
So, Mark, what you're saying is that the 240D front seats are not a mirror image set like the 300D. Of course the arm rest also figures in making the seats different, but in a different way. That is interesting news, as I have not had a 240D in the W123 chassis. Seems like it might limit the "swapability" when looking to upgrade front seats.
I never realized there was a difference in the seats either, but in terms of "swapability" as you say, just change the seat bottom mechanicals over as Jimmy said, the seat buns/frames are still the same. Also you can take the bottom seat portion on a w123 and use it on either side of the car, not so with the seatbacks though.
__________________
Chris
64 190D R.I.P.
80 240D W/617 engine -for sale
82 240D -for sale
Reply With Quote
  #7  
Old 11-02-2007, 02:13 PM
Registered User
 
Join Date: Apr 2003
Location: Phoenix Arizona. Ex Durban R.S.A.
Posts: 3,512
Extra strenght?

My 81 240D has that long bolt on both front seats. I always assumed it was simply for extra strength in anchoring the seats. I replaced my 240D's seat with one from a 300D which had an armrest and it just bolted straight in.

- Peter.
__________________
81 240D stick. 316000 miles at purchase. 342000 now
2000 GMC Sonoma
Formerly...
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles. Deceased Jan 08
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S
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 04:49 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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