Question about 1992 Mercedes-Benz Mercedes Benz S Class

3 Answers

I own a 1992Mercedes 400se. All the door and trunk locks do not work. Usually, when press down on the drivers door lock, all the other door locks will also go down. Now ever the trunk and gas flaps do not work either. I thought it might be the vacuum pump,under the rear seat, passenger side, the old motor smelled burned, so I replaced it with a new one. I even had to adopt a replacement kit to make the bosch pump work in place of the old Hella pump. Guess what, nothing works: the new pump does not go on, and none of the locks work. What's wrong? fuses? relays? Resent button? Where are they? I have not been able to get a good repair manual for these old MBs John.

Posted by on

  • John Santos Jul 29, 2009

    Can you tell me where the relays, fuses F-2-5, F 3-4, f-4-11 are? Also, too late I modified the new pump expecting all door locks, trunk lock, and gas flap lock would work.
    I will accept your answer.
    John

  • John Santos Jul 30, 2009

    Thanks for writing back again,
    Just to clarify:
    1)My Hella PSA pump smells burned.
    2) my door lock, trunk locks, and gas tank flap don't work,
    3) I will check the fuses tomarrow,
    4) Is there a relay for the pump under the back seat?
    5) I already bought the Bosh pump and installed it. I made modifications already. I don't think they accepted a used electrical part--$400.
    6) I want to make what I have work.
    Please help.

    Thanks for your patience.
    john

×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,185 Answers

Your problem is more than likely a broken wire in the wiring loom that goes to the driver's side door. Check the loom at the door hinge.


Also, try checking the pin switch (door switch) that is either out of adjustment or is faulty.

Another thing, it can also be the vacuum system that locks the trunk the same way the doors are locked. Maybe the vacuum device that locks the trunk is the problem.

Posted on Jul 30, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 321 Answers

There should be a clicking in the vac box.
if you do not hear it clicking then put the old box back on and listen for the clicking if no clicking you will need to check the fuses.check all fuses very carefuly.i have saved people lots of money on repare costs from other techs and turns out the fuse is blown.
changing out the box also is a problem.
even with an adapter .
dont use adapters .
go to ebay and find the right replacment part.
on mercedes if theres a bosch part out replace it with a bosch part.
dont listen to anyone about this i dont care who they are on this one.
these are setup to run one way only and if you go adding adapters your sure to make changes that are not pleasent or predictable.
your not talking about a sparkplug or something.if you leave the vac box unplugged the car wont even start.there are computers everywere and all work together. putting the hella is half the problem .
trusting someone about an adapter or just getting the right part is nothing to concider at all.
repairs are most of the time very simple to complete.
check ebay for the pumps
and take the hella back as its the wrong part.
also be very carefuly with the vac lines make sure none are or get cracked.
have someone use the key while you hold the box and listen for the vac box to run or click inside.
the relay in the vac box should click if indeed the motor is bad.
joelmitchell1@hotmail.com

keep me posted

Posted on Jul 29, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Mercedes-Benz Master
  • 1,619 Answers

Try going to benzworld.org or peachparts.com and looking for a relay for it but I would guess corrosion on barrel fuses first as they are aluminum and the contacts are copper. Pay the 15 dollars now to save issues later. Also hot wire your old pump to see if putting power to it makes it turn on. If so youll be sure its a relay. I would try and find a pump that also needs no kits to work in place. Plenty of salvage yards have parts. Try buymbparts.com and talk to Rusty he will get ou what you need. Also check for power at the pump that will tell you if the system has power from the relay. Most issues have more to do with the actuators and pods that move the locks rather than the pumps.....usually. If your pump did fail get a direct replacement not a mod. I hope I have helped shed some light.

Posted on Jul 28, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Drivers Door window/lock/trunk controls not working even though I replaced the Drivers door Wiring Harness


harness usually does not cause trouble because they do'nt move at all, check actuators if the are working, does it work remotely, test if passenger side control works if it does it would just be the driver side control trouble, replace

Mar 16, 2014 | Volkswagen Jetta Cars & Trucks

2 Answers

1990 Audi 100 key won't lock or unlock doors


This is usually caused by broken plastic parts in the lock system. The best would be to verify and lub all locks and check out the elecrical.
-------
kess v2

Mar 13, 2013 | Cars & Trucks

1 Answer

Buick 2002 LaSabre Custom all windows do not go up and down, door lock/unlock switch drivers side does not work(passenger & rear doors lock/unlock door switches work, trunk release button does n


coulb be the control switch on your panel you can take the door panel off and check for loose connections and try to test for continuity. if you dont know how take it to a shop and have them diagnose the electrical. im quite sure it the switch that burnt out

Oct 24, 2012 | 2002 Buick LeSabre

1 Answer

How do i manually release the rear door on a ssab 9-3 2003 as the door module has failed


Trunk Lock After Closing
--------------------------
Desc.: What happens to the trunk lock when closing it.

Settings:
Yes: Automatically lock Boot on closing
No: Boot can be reopened using micro switch button located on the trunk/boot

* Trunk Lock After Drive Off
----------------------------
Desc.: Should the trunk be locked at drive off or after 30 sec.?

Settings:
Yes: Trunk/Boot will automatically lock when vehicle increases speed
No: Trunk/Boot will remain closed, however will be in the unlocked
condition if No was selected in the previous option.

* Door & Trunk Unlock at Key Out
--------------------------------
Desc.: When the is removed from the center console should door/trunk
be unlocked?

Settings:
Yes: All Doors & Trunk/Boot will Unlock when the Key is removed from
the Ignition Switch If Driver frequently locked all Doors when
driving
this feature would be beneficial.
No: Doors and Boot will remain in the same condition as they were
prior
to Key removal

* TSL Locking Logic (Theft Security Locking/Deadlock)
-------------------
Settings:
TSL at first Press: Default Setting. All Doors will lock in Deadlock
Mode
TSL at Second Press: All Doors will lock in Deadlock mode at the second
press of the Remote.

* Lock /Unlock Acknowledge
--------------------------
Settings:
None : No acknowledge will be visible
Indicators: Indicators will blink as acknowledge

* Follow Me Home Function
-------------------------
Settings:
Tail Light: When selected Tail Lights will be illuminated
Back Up Light: When Selected Reverse Light will be activated


Tech 2 Body Exterior Lighting & Horn
====================================

* High Beam Follow me home Active Time
--------------------------------------
Desc.: Follow Me Home Active Time can be adjusted between 0- 10 minutes

Settings:
This Feature can be turned on or Off .Yes / No can be selected.
Low Beam Automatic / Low Beam also in Position 0 (light switch)
Yes / No
Follow Me Home Active Time
- Daytime Driving Lights can be activated

* Parking Lights
----------------

Settings:
Act as Lead Me To the Car Light.

* Park Light On Reminder
------------------------
Settings:
On / Off
If Ignition is turned Off and the parking lights are active, Driver will
be warned if set to on.

* Show Trailer Light Outage
Desc.: REC will detect blown trailer light and display on SID

Settings:
Yes or No

* Trailer Light / Fog Light off
-------------------------------

Settings:
Yes: Fog Light Rear will be disabled When Trailer is connected Yes
No

* Horn Lock Unlock Acknowledge
------------------------------
Settings:
On: Horn will honk when car is locked
Off: Horn will not honk if car is locked


Tech 2 Body Locking
===================

* Panic Alarm Activation (Vehicles fitted with /Alarm only)
-----------------------------------------------------------
- Panic Button / Locking Switch
Central Locking Switch Driver /Passenger

Settings:
- Panic Button on Remote and locking switch inside vehicle will
activate alarm
- Panic Button will activate Alarm only
- Locking Switch inside vehicle (driver /passenger will activate
alarm only
- No Panic Alarm function required.

* Unlock Logic
--------------
Settings:
All at first press : All Doors will open & Fuel Lid will unlock if the
Driver or Passenger Door Switch is activated
Driver Door & Fuel Lid at first press : Only the drivers Door will unlock
& Fuel Lid will unlock when door
switch is activated

* Remote unlocking One Press
----------------------------
Settings:
All at first press: All Doors will open & Fuel Lid will unlock if the
Remote is pressed
Driver door & Fuel Lid at first press: Only the drivers Door will unlock &
Fuel Lid will unlock when the Remote
is pressed

Dec 17, 2010 | 2003 Saab 9-3

1 Answer

12/6/2010 2003 bmw 325xi: Key does not manually lock/unlock driver door...but still works in ignition and trunk...central locking system still works to lock/unlock all doors(including driver) from...


If the key turns in the lock, but does nothing, then the linkage has become disconnected or broken. The key is mechanical to the lock and the lock has a electrical switch to operate the central locking unit. Could be a simple broken clip from the lock barrel. Hope this helps

Feb 27, 2017 | 2003 BMW 325

1 Answer

I have a 2004 Honda Accord EX. Key Fob works trunk but not doors


Programming
When
Key added or replaced. System malfunction.
How
Obtain all keys. A maximum of 3 keys can be programmed. Close all doors and boot/tailgate. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press key lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press key lock or unlock button. System should now lock or unlock vehicle. Within 4 seconds: Press key lock or unlock button. Within 10 seconds: Press lock or unlock button of first key. System should now lock or unlock vehicle. Press lock or unlock button of second key. System should now lock or unlock vehicle. Press lock or unlock button of third key. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed keys.
NOTE: If less than 3 keys are to be programmed, remove ignition key after programming last key.

Jan 25, 2010 | 2004 Honda Accord

1 Answer

Door locks not working properly.


one of the front door latches is out of adjustment or bad. when you lock it at the trunk try the front doors to see if they might still open when the alarm is set if so that is your bad latch. bad news is to replace it you will need to tear down the entire inside of door

Mar 24, 2009 | 1998 Audi A4

1 Answer

Key doesn't work to unlock door locks & remote doesn't work fully


try getting some dry lubricant and applying it in the lock this usually works well. cold weather usually makes the problem worse.

Jan 05, 2009 | 2000 Nissan Altima

2 Answers

2005 audi a8 trunk + upgrades for ipod integration


I had exact same problem, but what I found out was a three step solution to the problem.
1) The trunk lock above the trunk lid tself - sometimes looses coiling retention for the lock to work properly, which in effect does not properly lock wrap around the pull down electronic unit located in the body of the car/trunk that catches and pull the trunk lid down SOLUTION: check and make sure lock is works properly. you cab check by opening trunk and locking it with remote key, then pry the lock with a screw driver to see if it unlocks or stays locked

2) The motor catching unit in the body of the car/trunk that catches the lid and draws it down can be off balance (sitting too low to catch the lock (upper trunk lid with lock) to pull it down and stay locked. Have a mechanic - Audi preferrably, check the positon and allignment to adjust it, so it can catch trunk lid and lock to stay locked. HOPE THIS HELPS!

Dec 02, 2008 | 2005 Audi A8

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

226 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

yadayada
yadayada

Level 3 Expert

75817 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...