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 03-08-2016, 08:15 AM
Shadetree
 
Join Date: Jan 2010
Location: Back in SC upstate
Posts: 1,838
126 burglar alarm.

I've had to disable the alarm on my 300 SD due to a fault in the driver's door handle. Is it possible to change the tumblers in the handle?

__________________
84 300SD
85 380SE
83 528e
95 318ic
Reply With Quote
  #2  
Old 03-09-2016, 07:30 AM
Registered User
 
Join Date: Sep 2006
Location: Middle TN
Posts: 4,154
There are pictures where the lock is rekeyed. Ask Professor Google. I am having difficulty removing the key and tumbler so am obviously missing something. Will post pic of handle and lock when that project surfaces.
__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
Reply With Quote
  #3  
Old 03-09-2016, 02:10 PM
Shadetree
 
Join Date: Jan 2010
Location: Back in SC upstate
Posts: 1,838
Thank you kindly. I have the original handles on the car but the RS doesn't want to unlock with the key. The vac system works great on it though.
__________________
84 300SD
85 380SE
83 528e
95 318ic
Reply With Quote
  #4  
Old 03-09-2016, 03:55 PM
dude99's Avatar
Registered User
 
Join Date: Nov 2009
Location: Vancouver, BC
Posts: 1,493
If its anything like the w124 you can just change the microswitch in the door handle.
__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold
Reply With Quote
  #5  
Old 03-09-2016, 05:32 PM
Registered User
 
Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
From what I've read in the service bulletins, the problem is moisture getting into a microswitch. Their solution was replacement of the door handle to a version that had more weather protection.

However, dude99 could you enlighten us a little? Is this microswitch available separately? I'm wondering if they use a common part number. I've never seen a part break down that shows it, at least not for the W126.
Reply With Quote
  #6  
Old 03-09-2016, 06:15 PM
dude99's Avatar
Registered User
 
Join Date: Nov 2009
Location: Vancouver, BC
Posts: 1,493
I don't have my copy of the w126 or w124 service manual handy at the moment, I'll try to look it up. Basically you removed the outer door handle and you could remove the micro switch from there and replace it. Give me a few minutes and I'll see what I can dig up.
__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold
Reply With Quote
  #7  
Old 03-09-2016, 06:16 PM
dude99's Avatar
Registered User
 
Join Date: Nov 2009
Location: Vancouver, BC
Posts: 1,493
Here's the basic anatomy of the w124 assembly,
w124 door lock alarm switch fix

I'll see if I can dig up the w126 one
__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold
Reply With Quote
  #8  
Old 03-09-2016, 06:27 PM
dude99's Avatar
Registered User
 
Join Date: Nov 2009
Location: Vancouver, BC
Posts: 1,493
Ok here we go. First PDF is how to remove the w126 door handle (had to split it into two parts. If you look at the "Alarm w126 Page 11" document (which is part of the w126 service manual on the alarm system) you can see that it uses a separate microswitch that looks a lot like the w124 assembly. If you have a wrecker around you grab a microswitch from the passenger side door (since they see a lot less wear) and modify it to work on the drivers side as is mentioned in the link I provided in my previous post. Then you should be good to go.

A side note, I previously tried to get the alarm working in my w124 300TE wagon that had the same issue. Mine turned out not to be the micro switch but seemed to be the wring between the door and the car. I decided not to fix mine as I could't be bothered to string new wires though the car. I did however try changing the microswitch first.
Attached Files
File Type: pdf W126 Door handle front 1-3.pdf (552.7 KB, 71 views)
File Type: pdf W126 Door handle front 3-4.pdf (351.2 KB, 68 views)
File Type: pdf Alarm w126 page 11.pdf (88.6 KB, 69 views)
__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

Last edited by dude99; 03-09-2016 at 06:37 PM.
Reply With Quote
  #9  
Old 03-10-2016, 11:32 AM
Registered User
 
Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
Thanks! Great info! Mine only seems to cause problems in rainy weather. Mostly when it is pouring down buckets and you have to run out to unplug the controller.
Reply With Quote
  #10  
Old 03-10-2016, 09:05 PM
dude99's Avatar
Registered User
 
Join Date: Nov 2009
Location: Vancouver, BC
Posts: 1,493
Glad to help, if you need more info let me know. As for your rainy issue. Maybe take out the switch, let it dry, then slather it in some dielectric grease? That might help keep the water out of it. Just a thought.

Or perhaps theres some sort of internal seal thats gone bad..

__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold
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 04:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page