Question about 1987 Mercedes-Benz 300-Class

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420 sel door locks individually ony . it use to lock all doors with one key

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Central locking fuse or pnuematic pump under rear seat has gone bad.

Posted on May 05, 2010

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Posted on Jan 02, 2017

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2002 Cadi Deville, can't get any locks to operate with remote or dash push buttons, the remote operates everthing but the locks! When the remote door lock is pressed, lites flash,horn blows locks not.


Power Door Lock Operation
The vehicle is equipped with power door locks. Each lock actuator is powered and controlled by the door module mounted in the individual door, but the rear integration module (RIM), which is the master control for the door lock system, determines when the lock functions are permitted. The RIM receives and examines the requested lock function from the individual door modules, or from the remote function actuator (RFA) via the class 2 serial data circuit. The RIM also examines the transmission shift selector position and the ignition switch position information available over the Class 2 serial data circuits. If the RIM determines that a lock or unlock function is permitted, it sends a class 2 message back to the individual door modules commanding them to perform that Lock or Unlock function.
Power Door Lock Components
The power door lock system consists of the following components:
?€¢
Driver door lock switch


?€¢
Passenger front door lock switch


?€¢
LH rear door lock switch


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RH rear door lock switch


?€¢
LH middle door lock switch (w/ V4U)


?€¢
RH middle door lock switch (w/ V4U)


?€¢
Driver door switch assembly (DDSA)


?€¢
Driver door module (DDM)


?€¢
Passenger front door module (PDM)


?€¢
LH rear door module (LRDM)


?€¢
RH rear door module (RRDM)


?€¢
Left middle door module (LMDM) (w/ V4U)


?€¢
Right middle door module (RMDM) (w/ V4U)


?€¢
Driver door lock actuator


?€¢
Passenger front door lock actuator


?€¢
LH rear door lock actuator


?€¢
RH rear door lock actuator


?€¢
LH middle door lock actuator (w/V4U)


?€¢
RH middle door lock actuator (w/ V4U)


?€¢
Driver door cylinder unlock switch


?€¢
Rear integration module (RIM)


?€¢
DRVMDL fuse (10-amp)


?€¢
PASS MDL fuse (10-amp)


?€¢
RRDR MDL fuse (10-amp)


?€¢
Class 2 serial data link

Sep 27, 2016 | 2002 Cadillac Deville

1 Answer

Why my key will not unlock my door manually on my 2007 ford edge.why the anti theft mode is on the dash.


The manual unlock is operated by a set of small levers in the door. Either the connecting rod between the key mech and the door lock has become loose or the mechanism inside the lock itself is faulty.
Modern cars don't like being unlocked manually, you might have tripped the security system by trying to unlock the door, which could be why the anti-theft mode is giving you a warning. It's usually more of a warning that someone has tampered with the door locks and couldn't gain entry or something like that. If your car came with a manual for the security system, read up on it.

Feb 18, 2015 | 2007 Ford Edge SEL Plus

1 Answer

Door unlocks itself without repeatedly


this is a problem with the actual door lock probably the one in the drivers door as this one controls the others to test try locking individual doors manually with ign off the faulty one will try to resist being locked as i say usually the drivers door , cant be reoaired but search internet for a good price

May 01, 2014 | Suzuki Grand Vitara Cars & Trucks

1 Answer

2008 explorer door locks not locking from door switches


This is not a good thing. Ford uses a computer called the GEM and that means General Electronics Module. It controls:
  • Low Coolant Indicator On Cluster
  • Brake Indicator on Cluster
  • DRL - Control
  • Wipers
  • AutoLamps
  • Rear Defrost
  • Interior Lamps(dome)
  • High Beam Indicator only (cluster)
  • Low Coolant indicator
  • Key-in Buzzer
  • Seatbelt indicator only (Cluster)
  • Trunk Pop Relay
  • Power Locks
  • Door Ajar Sensors
  • Door Keyless entry pad
  • Remote Keyless Entry
  • One Touch Down (power window)
  • Air Bag Tone
  • Anti Theft (perimeter Alarm) (SEL, or SE(s) with mods)
  • Lift gate ajar (wagon)
  • Liftgate Pop
  • Accessory Delay signal (accessory that work after engine off, prior to door ajar)
  • Battery Saver Relay signal (accessory that work after engine off, 15 mins) Map lights, vanity mirrors

They are located behind the radio in the dash and they are $$$ about 600 USD.

Jan 27, 2014 | 2008 Ford Explorer

1 Answer

My FORD WINDSTAR 2000 SEL driver side sliding door is locked and will not allow me to unlock it even when all other doors have been unlocked.


The door lock actuator is stuck in the lock position you will need to slim jim it open meaning you will have to lose the door lock actuator on the driver sideor replace the door lock lock actuator

Aug 18, 2011 | 2000 Ford Windstar

1 Answer

The door locks on my Mercedes 420 SEL lock


Inspect first the wiring of the car. A grounded wire may cause this.

Nov 11, 2009 | 1987 Mercedes-Benz 300-Class

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