Question about 2004 Mercedes-Benz C-Class

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My 2004 c240 Merc alarm sounds when i open door,I cannot stop alarm with remote or unlock door with remote,but locks fine with remote,I have replaced remote batteries no change,Once locked with remote

Replaced remote batteries

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  • Mercedes-Benz Expert
  • 327 Answers

My best guess is that the remote is going bad or the receiver sensor in your car is getting goofy. But my money is on the remote itself. It's been used and banged around for 10 years and the inner workings just plain wear out. Just found out the average life span of a tv/cable DVR box is 2-3 years.

Posted on Nov 27, 2014

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Posted on Jan 02, 2017

alzhane
  • 1 Answer

SOURCE: Need to reprogram door locks for 2004 Toyota Camry

I recently replaced the battery on my 2004 Toyota Camry. When I installed new battery the door locks will not stay unlocked once opened with remote. How do I reprogram?

Posted on Apr 07, 2009

stevenhurc
  • 450 Answers

SOURCE: 2004 holden rodeo, remote control key wont lock/unlock doors

try putting key in ignition turn to on position
then press lock & unlock several times slowly if door locks cycle up & down after 1st press it lost code and is now resynconised.
now try remote with all doors closed and key out of ignition
if this dont work need to register key(program)back into system which dealer must do with Tech2 if round heart shapped remote

Posted on Jun 21, 2009

  • 1 Answer

SOURCE: my jaguar x-type 04, remote lock does not work,

Hi,

I have a similar problem in my x type. Although if I press unlock button on the key first and then use the metalic key to unlock it dissables the alarm.

Also according to the manual if you unlock by the metalic key the car starts a beeping sound its I think 15-20 second timer within which you should put the key and start the ignition (don't need to start the engin) this will dissarm the alarm if not the alarm will go off in 15-20 second.

Hope this information is of any use, am trying to get hold of Jaguar dealers to fix this issue. If you come accross any solution please do let me know too

Posted on Aug 03, 2009

alicantecoli
  • 22114 Answers

SOURCE: E36 BMW 318I CENTRAL LOCKING

try locking and unlocking the car with the key 3 times slowly ,other than that i have no idea ?? another trick is to disconnect battery and join the cables together for a few minutes to discharge any capacitors that may be holding a charge in the computer..Only other thing i can think of is the main dealers who have the right connectors and software to re set it all .sorry i havent been of any help

Posted on Aug 05, 2009

  • 13 Answers

SOURCE: can not lock car by key remote . toyota rav 4 53 plate

If your car has an alarm with a separate remote, it is a separate system and it is probably self-arming. When you lock the doors with the key central lock, the alarm gets armed by the RAV4 being OFF and the door locking action. When you unlock the doors with the key, the alarm is still armed because the key is not comunicating with the alarm just the cars factory keyless system.

Posted on Apr 10, 2010

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I do know that if you put the key in the ignition after you open the door and cycle the key from off to on 3 times fast within 5 seconds the alarm will disarm. Whether or not it is for good is unknown since you have to lock your doors again at some point. Your remote is discontinued by Subaru, but the the newer remote for the 2005 to 2007 models will work on your car, unless you already have one. I hope this info helps!

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Hello All, I have a '02 C240 and when recently a problem has started. The electronic key unlocks the car and when i get in and insert in the iginition, half of the times the alarm start going. Then i have...


It sounds like a alarm module malfunction,unfortunately you need to find a merc specialist to plug into the system to diagnose correctly with dedicted merc software to find the problem

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This does not sound like a fob fault - but a locking control module fault , either in the hardware or software of the unit. Get it checked at a Jaguar dealers. When unlocking using the key - as soon as the door is opened you should hear a chime sounding inside the car - this is a timer counting down to sounding the alarm. If you put your key in the ignition as soon as you open the door the alarm should not go off and the chime should stop. If it does not this again points to a fault in the locking controller.
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you will have to write your vehicles vin number down wich is if you look throught the windshild on the drivers side you will see it its a little plate with numbers but right down the vin number and take you drivers license and Registration with you to the chevy dealer ship and request the remote for that vehicle. and they should be able to get you one. as far as i know the remote is the only way to get the alarm off. I hope this helps you

Mar 21, 2009 | 2004 Chevrolet Tahoe

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Program remote control for mazda mpv 2002


Courtesy of: forums.mazdaworld.org

Try this, it works on several 2002 models:


Step 1: Open drivers door and leave open.

Step 2: Lock and unlock the drivers door using the power door lock switch on the door.

Step 3: Insert key into the ignition.

Step 4: Turn key to on position and return to off position. (IMPORTANT - use ON position NOT ACC position). Do this 3 times within 10 seconds. Leave key in the ignition.

Step 5: Open and close the drivers door 3 times. (Door should be left open after this step).

Step 6: ECU should respond by locking and unlocking the doors.

Step 7: Press any button on remote #1. ECU responds by locking and unlocking the car doors.

Step 8: Press any button on remote #2 (etc.) Each time the ECU will respond by locking & unlocking the doors.

Step 9: Remove the key from the ignition and the ECU will respond a final time with a series of door locks and unlocks. You're done

Dec 06, 2008 | 2000 Mazda MPV

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Malfunctioning car alarm 98 honda accord


For the system to arm, the ignition switch must be off and the key removed. Then, the multiplex control unit must receive signals that the doors, hood, and trunk lid are closed and locked. When everything is closed and locked, none of the control unit inputs are grounded.

The door switches, hood switch, trunk lid switch, door lock knob switches, and door lock cylinder switches are all open. Ten seconds after the doors are locked with the key or the lock knob, or immediately after locking the doors with the remote transmitter, the system arms.

If anything is opened or improperly unlocked after the system is armed, the control unit gets a ground signal from that switch, and the system is set off.

If one of the switches is misadjusted or there is a short in the system, the system will not arm. As long as the control unit continues to get a ground signal, it thinks the vehicle is not closed and locked and will not arm.

An alarm that sounds for no apparent reason may have been set off by a switch that is on the threshold of misadjustment. In this case, it may only take a significant change in outside temperature, the vibration of a passing truck, or someone bumping into the vehicle to make the alarm sound.

Nov 06, 2008 | 1998 Honda Accord

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Lock all the doors from the inside (with all the doors closed), unlock your driver's door by manually lifting the lock, then press it back down after you are out - this will prevent the alarm from sounding when you use the key to unlock the door.

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