Age, wear and tear can take its toll on even the finest of cars. This even includes the Mercedes-Benz automobile. 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-40 or equivalent product directly into the lock; open and close lock to recalibrate.
The National Highway Transportation and Safety Administration (NHTSA) issued a recall for select 2009 Mercedes S-Class sedans. That recall involved fixing the side door locks on affected models which might have been exchanged during production. According to the NHTSA, "...the exchange of a front and a rear passenger side door lock would result in a passenger side door that cannot be opened by merely pulling on the interior handle and a rear door lock that can be opened with a simple pull of the interior door handle even if locked." If you own this make/model/year car, contact Mercedes-Benz at (800) 367-6372 for assistance.
Mercedes S320 Problems
The Mercedes-Benz S320 is one of the trims of the automaker's full-size, flagship sedan, the S-Class series. It made its debut in...
Mercedes Mechanical Problems
Mercedes-Benz automobiles, manufactured by Mercedes-Benz of Germany, are renowned for luxury, quality and durability. However, a Mercedes still can suffer from some...
Mercedes 450SL Problems
Introduced in 1973, the Mercedes-Benz 450 Sport Light (SL) is a roadster manufactured by Mercedes.
How to Fix Power Lock Actuators
Power locks in a vehicle are a convenience most become accustomed to without thinking about them. However, over time these actuators can...
How to remove the door panels on Mercedes Benz (96-04)
This weHow article describes how to remove the door panels on Mercedes Benz SLK (96-04.) This tip will be helpful when replacing...
How to Open the Fuel Filler Door on the Ml320
If you've recently purchased your ML-320, you're probably wondering where the fuel filler door release is. The Mercedes-Benz ML-320 has an electronic...
How to Unlock a Gas Door Lock on a Mercedes Benz S320
Mercedes-Benz and other car companies put locks on their vehicles' gas doors to prevent people, who do not own the vehicle, from...
How to Reset a Flexible Service System in a Mercedes C280
The Mercedes C280 is equipped with a Flexible Service System, or FSS. The system calculates when the next service is due based...
How to Use an E320 Child Door Lock
A Mercedes-Benz E320 was first introduced as part of the Mercedes Benz E Class Series in 1996. It is a luxury automobile...
How to Open a Mercedes Trunk
Opening a trunk on a Mercedes is generally the same for all Mercedes vehicle models. On all Mercedes, the trunk can be...
How to Reset a Mercedes Key
Mercedes-Benz is an auto manufacturer of high-end luxury vehicles. Mercedes-Benz owners each have car keys with fobs attached that allow them the...
How to Repair a Mercedes Key Fob
Mercedes key fobs are known as SmartKeys. Every late-model Mercedes-Benz vehicle is equipped with a SmartKey, which allows you to lock and...
How to Troubleshoot a Mercedes Benz E320
The Mercedes Benz E320 is a four-door sedan that is part of the executive E-Class range of vehicles. The E320 has been...