Your Mercedes is a stable vehicle that was built to last for a long time. When you bought it you knew that you would own it for many years. During those years you have come to expect that the functionality would last. As your Mercedes ages, there are going to be certain parts that fail and need to be repaired or replaced. One such part is the MAF sensor. Below you will find out more about what the MAF sensor is and what signs of failure to look for.
The Mass Airflow Sensor
In order for your Mercedes to properly operate, the engine needs to have the correct mixture of air and fuel running through it. If there is too much or too little of either part, the engine is going to be compromised.
So, in order for the air portion of the mixture to be correct, it is monitored by the Mass AirFlow (MAF) sensor. The MAF sensor is responsible for calculating the amount of air that is coming into the vehicle and sending this information to your Mercedes’s computer. Based on the readings from the mass airflow sensor, the computer will then make any and all required adjustments to the engine airflow.
The way the MAF sensor is designed is simple. The part consists of 2 wires. One wire is heated and the other is cool. The readings are produced by determining what current is required for keeping the heated wire at 200 degrees Fahrenheit. This measurement is what is sent to the computer of your Mercedes.
Signs of MAF Sensor Failure
The first sign to look for and be aware of is lean idling. As stated before, a properly-balanced mixture of air and fuel is required for optimal engine function. If the MAF sensor has failed, then incorrect or no readings will be sent to the computer. This will cause the engine to have too much air in the system. The increased amount of air in the engine will lead to a failed combustion process. So, when you are attempting to start your engine, it may take a couple of tries because the overflow of air in the system is preventing proper and complete combustion.
The second sign that will point to MAF sensor failure is a delay in acceleration. You will notice this occurs whenever you are attempting to reach higher speeds. When you step on the gas pedal, the response may not be immediate. A failure in the MAF sensor can cause this issue because the sensor will disrupt the amount of gasoline that is getting to the engine. So with a lack of gasoline, there will be a delayed response in acceleration.
The third sign that you can use to identify MAF sensor failure is excessive gasoline consumption. When the MAF sensor is not working as it should, the readings the computer is getting is inaccurate. So when this happens, the incorrect amount of air is being pumped into the mixture. This will cause more gasoline to be used in order to make up for the lack of air being used. You will notice this when you are constantly having to fill up your Mercedes’s fuel tank.
One last sign and the most common symptom that will let you know there is a MAF sensor failure, is an illuminated check engine light. Whenever there is an issue with a part in your Mercedes that is controlled by a computer, you will know about it because a service light will illuminate on the dashboard. You can expect this same thing to occur when there is a MAF sensor failure. The check engine light will come on, and you will need to take your Mercedes to a shop to have a diagnostic test run.
Repairing the MAF Sensor
Now that you know the signs that will help you to identify MAF sensor failures, it is time to have that failure fixed. The failure could be caused by faulty wires in the sensor, dust and grime, or general wear and tear. Any and all of these causes should be looked at and identified by a trained and certified technician. You will be able to find just that here at Turning Wrenches in Louisville, KY. We will use the most up-to-date tools and equipment in order to properly diagnose the MAF sensor failure. Once the issue has been identified, we will work with you in forming a repair or replacement plan. You will leave our shop happy and satisfied with the work that was done on your Mercedes.
The crankshaft position sensor is an important measurement tool that is essential in all modern combustion engines, including your Mercedes. It is needed to monitor the speed of rotation and the position of the crankshaft. It sends the information it collects to the Electronic Control Unit (ECU) which is the main computer onboard your Mercedes.
The data given by the crankshaft position sensor allows the ECU to make alterations as needed to ensure your Mercedes achieves high-level performance. This means that accurate information regarding the crankshaft position and speed is essential for maintaining good engine management and timing. Ultimately, when the crankshaft position sensor fails, the engine is unable to run correctly if at all.
The crankshaft position sensor rarely fails without warning. There are usually some signs and symptoms that occur which can make you suspicious. Let’s learn more about this important sensor, why it fails, and how you can tell if failure has occurred.
How the Crankshaft Position Sensor Works
Located next to the flywheel ring gear, the crankshaft sensor can come in 2 different variants. Your Mercedes will either use an inductive sensor or a hall generator. These two forms work by altering magnetic fields using the ring gears rotational movement. The magnetic field which is created is used to form a range of voltage signals which are then picked up and used by the ECU.
Reasons Behind Crankshaft Position Sensor Failure
As the crankshaft position sensor is an electronic component, the reasons why it fails largely follows the same reasons as the other electronic systems of your Mercedes:
wiring short circuits
damaged or cut wiring
damaged encoder wheel
metal abrasion causing soiling and contamination
How to Tell if your Mercedes has a Faulty Crankshaft Position Sensor
There are 3 key signs which can indicate imminent failure of the crankshaft position sensor. Remember, without a working sensor, your Mercedes is unlikely to go anywhere at all, so watch for the early warning signs below.
As the crankshaft position sensor helps regulate the timing of your Mercedes’ engine, when it starts to fail, you will likely notice starting your car successfully first time around starts to become a rarity. Without the data provided by the crankshaft position sensor, your ECU is left guessing. This can create a chain reaction that has all your engine systems running out of sync with one another, which will cause a false start. As the problem progresses, your vehicle may reach a point where it is simply unable to start.
If your Mercedes stalls intermittently, then the crankshaft position sensor may be on the fritz. This is commonly caused by issues with the sensor’s external wiring and not with the sensor module itself. When the wiring is damaged, the connection between the sensor and the ECU becomes spotty, despite the sensor working perfectly. This will result in your Mercedes performing normally and then suddenly and intermittently stalling when the connection between the two parts is lost. This issue should be resolved as soon as possible because any rogue element that makes your vehicle unpredictable is an accident waiting to happen.
Engine Management Light
The check engine light, otherwise known as the Engine Management Light or EML, can be triggered by the ECU whenever an issue with the engine is detected. This can range from low-level issues such as a loose gas cap to more severe problems, such as catalytic converter failure. As a failing crankshaft position sensor throws the engine’s timing into dysregulation, it can cause the ECU to trigger the engine management light. This will then send out a relevant error code which can be diagnosed by a professional mechanic. This light is meant to safeguard the health of your engine and should never be ignored.
At Turning Wrenches of Louisville, KY, we are passionate about auto repairs and servicing. We have a hardworking team of mechanics who will work diligently to fix the problem with your Mercedes, be it the crankshaft position sensor failure, or other unrelated problems. So, for trustworthy repairs and great customer service, look no further than Turning Wrenches. Our dedicated customer service team is ready and waiting to take your call.
Mercedes Benz is known for its high-performance engine, next-generation innovations, and a sophisticated interior. One system that is well-known for contributing to the incredible driving experience that Mercedes Benz offers is the AirMatic system. Let’s dive deeper into this integral system and look at ways to ensure each drive is the ultimate driving experience.
The Value of the AirMatic System
The AirMatic system is an air suspension marvel developed by Mercedes for their new models. The AirMatic system works in unison with the Air Dampening System (ADS) to create an unbelievably-smooth driving experience. The ADS provides the suspension with a cushion, while the AirMatic system controls air inside the suspension to match the terrain and driving conditions.
Why It’s Important to Keep your AirMatic System Well-Maintained
When you’re driving your dream car, it is essential that you keep on top of maintenance. Maintenance helps extend the lifespan of your Mercedes and ensures that each drive feels as good as the last. Without proper maintenance, parts will start to wear and then fail. You will notice a dramatic drop in performance and may become frustrated with potentially-dangerous symptoms caused by failing parts. When it comes to caring for your AirMatic system, we’ve listed some of the top maintenance tips below.
Check for Leaks
To keep an air-based suspension system working at top levels, you always need to be on the lookout for air leaks. Air leaks can put a strain on essential parts of the suspension system, such as the compressor. This can lead to premature part failure. There are kits available for purchase that can help you patch a minor leak at home, but for complete peace of mind, you should bring your Mercedes to a specialist for repairs.
Loose Air Lines
As part of your regular, ongoing maintenance, you should check the air lines or the AirMatic System. You should be inspecting these to see that the lines have a secure connection to other parts of the system. This will ensure the correct pressure is able to be maintained within the system. This will reduce the pressure on other parts to over-perform to compensate.
Check the Air Springs
The final crucial part of your ongoing AirMatic maintenance should be to check the air springs. The air springs are designed to expand and contract at a steady pressure, which helps to keep the driving experience smooth. These springs should ideally be kept at a pressure of 5psi, but check with your owner’s manual to make sure your springs are tuned to the specifics of your Mercedes model.
Cleaning and Maintaining the AirMatic System
As with most parts of your vehicle, proper maintenance involves ensuring that parts are clean of dirt and grime which can interfere with the correct operation of the system. Debris build up can be a leading and yet preventable cause of many types of part failure. Buildup can have you shelling out money for repairs that could have been avoided. So if you want to save money, spend a little time giving your Mercedes some proper TLC.
Spending some time checking and cleaning your car will also allow you to spot small changes or early stages of part failure, meaning you can respond much more quickly to any issue your Mercedes might face. Any repairs will remain straightforward, quick, and affordable.
Regularly Scheduled Maintenance
The number one way to ensure your Mercedes Benz remains operating at peak performance is to keep up with your servicing record. Having your Mercedes inspected by a professional repair shop will ensure that any issue is caught early on. Parts can be inspected, tested, and fine tuned, meaning your Mercedes will always be at its best.