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 ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-07-2008, 10:17 PM
Registered User
 
Join Date: Jan 2008
Posts: 98
Door Locks...

Hey guys I have a 300 SDL 1987....The door locks I noticed recently when unlocking the doors at the drivers side the rest of the locks wont go up...but when i get into the car I hear a buzzing in the back seat area...maybe trunk that sounds like a car antenna trying to go up but its stuck...then after 15 secs it stops...I know this is related to the locks how do I fix this...

Chris
Reply With Quote
  #2  
Old 09-07-2008, 10:32 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
I'm not sure where the pump is in the '87, it is in the trunk next to the spare in the '91. Anyway, if a line breaks somewhere, the pump will run and do nothing.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #3  
Old 09-07-2008, 10:33 PM
Registered User
 
Join Date: Jul 2007
Location: USA
Posts: 2,156
Sounds like a vacuum problem. So you have a hole in one of the vacuum lines, line disconnected(seen it) or a bad supply pump. Also you may have holes in the Y connectors. Also the vacuum actuators in the door mabye faulty

AS for the sound do you have anything on?
__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)
Reply With Quote
  #4  
Old 09-08-2008, 12:34 AM
Registered User
 
Join Date: Jan 2008
Posts: 98
nope...just after I unlock and sit in the car...I hear the noise for about 15 secs


Where are these lines at?
Reply With Quote
  #5  
Old 09-08-2008, 05:18 PM
Registered User
 
Join Date: Jan 2008
Posts: 98
bump
Reply With Quote
  #6  
Old 09-08-2008, 05:40 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,868
Usually under the carpets and in the doors.
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

82 300D 322K My Daily Driver-Warndreicke in the trunk. Trip ODO still working!

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #7  
Old 09-08-2008, 06:58 PM
Registered User
 
Join Date: Jan 2008
Posts: 98
are any of the vaccum connections start under the hood cause I have a few deteriorates vaccum lines I can see in there...
Reply With Quote
  #8  
Old 09-08-2008, 07:17 PM
tyl604's Avatar
Registered User
 
Join Date: Feb 2008
Location: Atlanta, GA
Posts: 2,534
The vac lines under the hood have nothing to do with the locks. Open up the channel on the right side of the passenger floor; plug your mityvac in there to each vac line one at a time and determine where you have no vacuum. Then trace that line. You may have to replace a door lock actuator or just a rubber connector - or you might need to replace the pump. Sounds like the pump may be OK. I replaced two door actuators in my 300SD and all the locks work again.
Reply With Quote
  #9  
Old 09-09-2008, 04:09 AM
Registered User
 
Join Date: Jan 2008
Posts: 98
Where is the pump located at?
Reply With Quote
  #10  
Old 09-09-2008, 06:04 AM
hey_allen's Avatar
greasy fingered tinkerer
 
Join Date: May 2006
Location: Tacoma, WA
Posts: 728
If it's at all like most of the rest of the w126 cars, the pump is located in the spare tire well, just to the right rear of the tire itself. Most likely it is covered by a metal guard plate, and cocooned in a foam "football".

The vacuum plumbing on my cars is located along the right floorboard, near the door sill. To get to it, you have to lift the carpet up, and then the edge of the plastic cover that guards the wiring and plumbing along the floor.

The fastest point I found to test for leaks was to disconnect the line coming from the pump at the junction where it hits the fuel door lock, just behind the trunk carpet on the right side. I hooked up a vacuum gauge to watch the needle swing.

Best of luck, and happy plumbing! :p
__________________
-Josh
Testing the cheap Mercedes axiom, one bolt at a time...
Reply With Quote
  #11  
Old 09-09-2008, 08:49 AM
Dee8go's Avatar
Senor User
 
Join Date: Apr 2006
Location: Arlington, VA
Posts: 7,184
Would a vacuum problem like this also cause door to not open at all? The rear passenger door on my 300TD has stopped unlocking. Just prior to that, however it would not open even when unlocked. At least it appeared to be unlocked.
__________________
" The market, like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do."- Warren Buffett

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 25,000 miles
Reply With Quote
  #12  
Old 09-09-2008, 03:05 PM
Registered User
 
Join Date: Jul 2007
Location: USA
Posts: 2,156
Vacuum lines are underneath the carpet and go into the doors. The only problem with w126 carpeting is that is 1 piece unlike the w123.

There are Y connectors in the front both passenger and driver side underneath the carpeting area which have the vacuum lines that go to the rear doors.

In some cases I have seen them completetly disconnected on cars to having cracks in the Y connectors and the door actuator not hold vacuum
__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)
Reply With Quote
  #13  
Old 09-09-2008, 03:15 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,868
Quote:
Originally Posted by Dee8go View Post
Would a vacuum problem like this also cause door to not open at all? The rear passenger door on my 300TD has stopped unlocking. Just prior to that, however it would not open even when unlocked. At least it appeared to be unlocked.
If the unlocking mechanism stuck in the locked position, then yes. It could also be that the linkage became disconnected.
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

82 300D 322K My Daily Driver-Warndreicke in the trunk. Trip ODO still working!

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #14  
Old 09-09-2008, 03:44 PM
remotemark's Avatar
Geplatzt
 
Join Date: Aug 2007
Location: Philadelphia
Posts: 1,018
Quote:
Originally Posted by tyl604 View Post
The vac lines under the hood have nothing to do with the locks. Open up the channel on the right side of the passenger floor; plug your mityvac in there to each vac line one at a time and determine where you have no vacuum. Then trace that line. You may have to replace a door lock actuator or just a rubber connector - or you might need to replace the pump. Sounds like the pump may be OK. I replaced two door actuators in my 300SD and all the locks work again.
Is an "actuator" the same as an "element"?
__________________
I never go far without a little Big Star

1994 E500 199/Gray 82k
84 300D (Salty) Orient Red/Palomino 141k
88 300CE (Ersatzhammer) 904/Java 163k -- Turbo Technics twin turbo kit, AMG Gen I body kit, Sportline steering box and steering wheel, Sportline/Eibach /Bilstein Sport/500E suspension, Quaife LSD in 210 mm diff case, Silver Arrow brakes.
88 300CE Brabus 3.6 199 on Black 44k
Reply With Quote
  #15  
Old 09-09-2008, 04:08 PM
tyl604's Avatar
Registered User
 
Join Date: Feb 2008
Location: Atlanta, GA
Posts: 2,534
The actuator is a blue (original) or black (new) plastic device with 1) a connection for the vacuum hose and 2) a connector to a push rod which locks/unlocks. Not sure what an element is.
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 12:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page