Mercedes e320 door lock problems

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM. Average rating from customers who received a Power door locks are not working Inspection.

Learn More. Power door locks are the most important security element of your vehicle. They keep potential thieves and burglars out of your car, and make it easy for you to lock and unlock your doors in a hurry.

The power door lock system is a relatively simple system. When you press the lock or unlock button located on your key, or inside your vehiclethe power door lock sends a relay signal to the power door lock actuator. The actuator, through a series of gears, locks or unlocks the door or doors that you are controlling. There are three primary components of the power door lock system that can fail, resulting in a useless power door lock:.

Blown fuse : A fuse is a low resistance resistor that creates overcurrent protection. Essentially, the fuse takes a large amount of electrical current, and converts it into a smaller, more manageable amount of current that the door lock actuator can have. Dead power door lock switch : The power door lock switch is a relatively simple rocker switch. It reacts to you pressing the lock or unlock button, and sends a simple signal to the actuator.

Like light switches, the power door lock switch can die due to frequent use.

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Malfunctioning power door lock actuator : The power door lock actuator is the part of the power door lock system that actually controls the locks. The actuator is a series of gears, with a set of rack and pinion gears at the end.

When the actuator gets the signal from the power door lock switch, a small motor turns the gears. The rack and pinion are able to convert the rotational motion of the motor to a vertical motion, which locks and unlocks the doors. Like the power door lock switch, the power door lock actuator can malfunction due to the large amount of use that it gets. A mechanic can often tell by the sound whether the problem lies with the fuse, the power door lock switch, or the power door lock actuator. After determining the problem with the system, the malfunctioning piece will be replaced.Age, wear and tear can take its toll on even the finest of cars.

This even includes the Mercedes-Benz automobile.

mercedes e320 door lock problems

Regular maintenance can prevent some problems, but servicing your car as soon as a problem surfaces can keep things from escalating. Several types of door lock problems have been identified across the Mercedes line, but with identifiable solutions--including some you can handle yourself. If all of the locks on your Mercedes fail to open or close first check your key fob to make certain that its battery is working. Replace the worn out battery, if necessary.

If key fob is working, you may have a faulty key fob, which can be repaired or replaced by taking it to your dealer. If just one lock won't open on your Mercedes, then the problem may rest with broken wiring, a bad solenoid, or perhaps with a blown fuse.

Check your fuse box first to determine if a blown fuse is keeping the lock from working. If so, replace the fuse. You likely have a shorted door lock actuator, which you can replace with a new unit for the lock that is not working.

If a door unlocks, but will not lock again, then replace the door switch. Perhaps your Mercedes locks work, but they open and close slowly. Apply WD or equivalent product directly into the lock; open and close lock to recalibrate. That recall involved fixing the side door locks on affected models which might have been exchanged during production.

This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. References Door Lock Problems W door locks.

About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Log in or Sign up. Mercedes-Benz Owners' Forums. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More. Tags: central locking locks w Hi Apologies if I've added to other threads along the same lines, but car is driving me mad.

My C W elegance auto saloon has developed a fault with the central locking.

mercedes e320 door lock problems

It won't lock from a distance. Changed the batteries in both fobs. Still doesn't work, sometimes even when only a few inches from the door handle sensor. Somedays it will; others it won't. When locked with the fob sometimes but opened with the key, alarm does not go off, but hazards flash. Is this right? The door lock button on the dash works as does the auto lock after 10mph. Also, correctly, unlocks all doors when a door is opened from inside.

Someone said it might be the amp in the C pillar - anyone else have any thoughts before I start to tear out the trim and spend money? Other garages don't want to know. Yes if it works with the key a few inches from the door handle but not from way off the Amp in C pillar will have failed, this normally affects the radio where reception will be poor and noisy.

The key could have failed on the RF side, is the spare the same. Hi I don't have any radio reception problems, and both key fobs are the same. Today Sunday it would not lock or unlock with the remote fob at all - I had to use the metal key.

How do you test the key fobs? Alex CrowMar 6, Picture The amp also have 2 smd fuses in side that can be replaced. Thanks guys. Tested the fobs with my digi camera - they're working OK. AM radio reception is fine if you can ever say that about Medium-wave.

Hope so. Car is going to local garage tomorrow Tue 8th who says he has a Merc himself and that his mechanic is MB trained why isn't he still working for MB I ask myself? Will let you know the outcome. Thanks again. Does the guy have STAR.

Don't know about STAR, but the garage rang this morning to say that the fault is with the door handle. They also said it may need re-programming afterwards. Might not be as bad financially as I expected. I will re-post when fixed. Thanks again everyone.

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The door handle has nothing to do with the long range locking, the could should lock from 25 feet or more.The most recently reported issues are listed below. No child safety locks for the rear seats. The child is able to open the door while the car is at speed. The doors do lock automatically at 9 mph but you can open the door by pulling the lock up then pulling the door handle open. See all problems of the Mercedes Benz E The right rear door on my Mercedes Benz E did not latch completely and opened while driving with my daughter in the back seat next to it.

The door appeared closed when we started becuase I always check that the kids have shut the door completely becuase they are hard to close. I stopped the vehicle and jiggled the handle until the latch would work again. A few days later the door would not open from the inside.

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I took the vehicle to the dealer and was told it was not a safety issue. The dealer fixed the vehicle and indicated that the latch was jammed. The vehicle has been in service since Jul 25, and has 71, miles on it but I don't think the doors should open while driving. I am concerned about the other doors not being inspected. I would cost me 1. I sent an email to mbna inquiring about service bulletins or recalls but have not recieved a response.

This type of poor design or quality can lead to serious consequences of an injury or fatality if someone fell out.

Car Problems. Door Latch problem of the Mercedes Benz E 1. Door Latch problem of the Mercedes Benz E 2.Central locking in Mercedes-Benz W models controls door locks, trunk lid or luggage compartment lock and fuel filler flap lock. The electronic functions of central locking are spread out over several door control modules, with sensors and actuators connected directly to a control module in the vicinity of their installed location.

The rear electronic SAM module is the master control module for central locking. The lock mechanism in each door consists of a latch, an exterior door handle and an inside door lock release handle. Only the driver door left front in North America is equipped with a lock cylinder. The exterior door latch is responsible for locking, unlocking and latching the door shut. The latch itself is pretty reliable.

However, having the electronic lock solenoid integrated in the latch creates some problems. The lock solenoids fail over time, leaving you with a malfunctioning lock. If it is the driver lock, you can still lock and unlock with the key.

With other kinds of doors, you may not be so lucky. If you are having a problem with the lock, try cleaning and lubricating the latch. I find this will restore function of the lock from time to time.

If I can successfully restore function this way, I still replace the latch to avoid future problems. It is a good test to see if the problem is electrical or mechanical. Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement.

The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle.

If you're working with the electrical system, disconnect the battery before beginning.

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Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability. Our vehicle may vary slightly from yours as models do change and evolve, as they grow older.

If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below.

NHTSA — Latches/Locks/Linkages: Doors: Latch Problems

When leaving a comment, please leave your vehicle information. Remove the interior door panel. See our tech article on front door panel removing.

Slowly peel the vapor barrier green arrow off the door. Be careful not to tear the barrier while removing it. If the vapor barrier tears, replace it.

The red arrows points to the butyl seal you are separating from the door. Large Image Extra-Large Image. Working at the outer edge of the door, in line with the outer door handle, pull the seal away from the door red arrow.In this article, we will go over what is involved with replacing the door lock actuators on the W Mercedes.

These cars use a vacuum operated system to lock and unlock the doors. The system uses a vacuum pump mounted under the passenger seat to either suck or blow air through lines to each door.

At each door, there is a vacuum diaphragm that over time can leak and eventually fail. By today's standards, this type of system may seem a bit illogical.

mercedes e320 door lock problems

In fact, nearly everyone I told about the system said, "Why wouldn't they just use a electric solenoid?

Nowadays, electronics are nearly foolproof and are cheap enough to use in almost any application. Mercedes started using vacuum operated locks sometime in the 's, when modern electronics were still expensive and not quite reliable enough to be used in a system that would be used so frequently. The W Mercedes was one of the last cars produced that still used the older, proven vacuum system before finally converting to electrically operated door locks. Unfortunately, as the cars age, the components of the vacuum system can deteriorate, eventually leading to leaks that will typically prevent one door from locking while the others lock with no problem.

The one door can still be locked manually by pressing the lock button down; however on some cars like ours, there is no lock cylinder on the driver's side door. This presents the problem of having to press the lock button down on the driver's door with the door closed. Obviously, not many people are going to want to press the lock button down from the passenger side or climb over the center console to exit the car. The first step in replacing the actuator is to disconnect the battery.

Mercedes Door Lock Repair - Bouncing Issue Fix

Remove the small plastic plate at the bottom of the rear passenger seat. Underneath is a 11mm nut holding the negative terminal from the battery to ground. Remove the nut and pull the cable off. Remove the screw holding the door latch cover in place. Once removed, take the cover off. Pry out the surround piece around the door handle. It just pops out. Underneath is a large Phillips head screw. Remove the screw and set it aside in a safe place. Pry out the "SRS Airbag" cover piece. Below is a Phillips head screw.

Also unscrew the door lock button. Remove the trim plug underneath the door pull. Beneath is a Phillips head screw as well. Remove the screw. Now pry out the light switch along the bottom edge of the door panel. Disconnect the wires going to the light.

You'll now need to take a large flat head screwdriver and pry the door panel off along the front bottom and back edges.Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Average rating from customers who received a Door does not lock or open Inspection. Learn More. It could also be that the mechanical linkage connecting the handles to the latch is broken or jammed. A top-rated mobile mechanic will come to your home or office to determine the source and cause of the door lock issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

Book a mechanic for a thorough inspection as soon as possible. Mercedes-Benz E Door does not lock or open Inspection at your home or office. Get an upfront price. Service Area. How A Diagnostic Works Instantly book a certified mobile mechanic to come to you. Mechanic diagnoses the problem and quotes necessary repairs. Your vehicle is ready to go. Our certified mobile mechanics can come to you now.

See availability. Common reasons for this to happen: One of the plastic clips broke and the rod fell off Door kicker or relay has gone bad Door lock cylinder is damaged.

What to expect: A top-rated mobile mechanic will come to your home or office to determine the source and cause of the door lock issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

NHTSA — Latches/Locks/Linkages Problems

Number of Mercedes-Benz E services completed. Yourmechanic was featured in. Popular Mercedes-Benz Jobs.

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Auto service in Your City. Meet some of our expert Mercedes-Benz mechanics Real customer reviews from Mercedes-Benz owners like you. Excellent Rating. Average Rating 4. Number of Reviews Rating Summary. Tam 21 years of experience. Request Tam.

Mercedes Door Lock Problems

This wasn't an easy job for Tam. It's fortunate that he was able to complete his previous assignment earlier than expected. The car's battery is located under the rear seat and has two release latches to remove the seat for access to the battery. The right side latch operated smoothly and easily but the left side was stubborn and wouldn't unlatch. Tam persisted and made every effort not to damage the plastic latch.

After many tries he succeeded in removing the seat.


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