If a Mercedes vehicle’s radar sensor becomes dirty, it can impair the vehicle’s ability to function properly. The radar sensor is used for several safety features, including adaptive cruise control, collision avoidance, and lane departure warning.
If the sensor becomes dirty, it may be unable to detect objects or obstacles in the path of the vehicle, resulting in decreased functionality or even failure of these safety features. It is recommended that the sensor be cleaned by a professional or that the manufacturer’s instructions be followed.
In this article, you will learn everything you need to know about the Mercedes radar sensor, what happens when it is dirty the things to do when it is dirty. So stick around until the end to find out what you’ve been looking for.
Table of Contents
What does the radar sensor do in a Mercedes?
In a Mercedes vehicle, a radar sensor is used for a variety of advanced driver assistance systems (ADAS) and safety features. These are some examples:
Adaptive cruise control: The sensor detects vehicles ahead and adjusts the vehicle’s speed automatically to maintain a safe distance.
Collision avoidance: The sensor detects potential collisions with other vehicles or obstacles and warns the driver, or even automatically applies the brakes to avoid or mitigate a crash.
Lane departure warning: The sensor detects and warns the driver when the vehicle drifts out of its lane.
Blind spot detection: The sensor detects other vehicles in the driver’s blind spot and warns them.
Automatic emergency braking: The sensor detects a potential collision and automatically applies the brakes to avoid or mitigate a collision.
Overall, the radar sensor is an important safety feature that assists the driver in detecting potential road hazards and responding appropriately.
“Radar sensor dirty, See owner’s manual” What does it really mean in a Mercedes?
If a Mercedes-Benz vehicle’s radar sensor becomes dirty, the driver may be notified via the dashboard display or instrument cluster. The notification could be in the form of a warning message or an error code. A warning light, such as a yellow or red triangle, may also be present.
The exact message or warning light that appears may differ depending on the vehicle’s model and year. The message could mean that the radar sensor is dirty or obstructed, or that certain advanced driver assistance systems (ADAS) or safety features aren’t working properly because of the dirty sensor.
If your Mercedes-Benz vehicle receives a notification about a dirty radar sensor, it is recommended that you have the sensor cleaned as soon as possible by a professional or by following the manufacturer’s instructions. A dirty sensor can impair the vehicle’s ability to function properly and may even cause safety features to fail.
Mercedes-Benz radar sensor location
Usually, the short-range radar sensors located on both sides of the rear bumper typically monitor the areas directly alongside and behind the vehicle.
The location of the radar sensor on a Mercedes-Benz vehicle varies depending on the vehicle’s model and year. However, in most cases, the radar sensor is located in the front of the vehicle, usually behind the front grille or bumper.
The radar sensor may be integrated into the front camera in some models, which is typically located near the rearview mirror or on the windshield.
It is recommended that you consult your owner’s manual or a Mercedes-Benz dealership for specific information on the location of the radar sensor in your vehicle.
Mercedes radar sensor replacement
When to replace a Mercedes-Benz radar sensor is determined by the nature of the problem. What are the signs of a faulty radar sensor?
The following are some symptoms of a faulty or damaged radar sensor:
- Dashboard warning lights or error messages
- Advanced driver assistance systems (ADAS) or safety features that are reduced or non-functional
- Unusual or unexpected vehicle behavior
It is recommended that if you suspect a problem with your radar sensor, you have your vehicle inspected by a Mercedes-Benz dealership or a qualified technician.
How do you test a radar sensor?
To test the radar stationary mode, place a vibrating fork a few inches in front of the antenna; the radar should read the speed that the fork is calibrated to induce. To begin vibrating the fork, gently strike the top side against a hard object, such as wood or plastic, rather than metal.
How the radar sensor can be fixed?
A qualified technician is typically required to replace a radar sensor on a Mercedes-Benz vehicle. The procedure can be complicated because accessing the sensor may necessitate disassembling the front of the vehicle.
If the sensor is dirty or clogged, it can be cleaned and may not need to be replaced. However, if the sensor is faulty or damaged, it must be replaced.
How much does it cost?
The cost of replacing a radar sensor in a Mercedes-Benz vehicle varies depending on the model and year of the vehicle, as well as the sensor’s location.
The cost of the sensor and labor can typically range from several hundred to several thousand dollars. A specific cost for your vehicle should be confirmed with a Mercedes-Benz dealership or a qualified technician.
It is important to note that some models include a radar sensor integrated with other sensors such as cameras, so the cost and process of replacing the sensor may vary from model to model.
How to clean radar sensor Mercedes?
Cleaning the radar sensor on a Mercedes vehicle, such as a Sprinter, requires caution and specific steps. Here’s a general outline of how to clean the radar sensor:
- Locate the radar sensor: The radar sensor is usually situated behind the front grille, typically in the center or on the sides. Refer to the vehicle’s manual or consult a qualified technician to identify the exact location.
- Power off the vehicle: Ensure that the engine is turned off and the vehicle is in park.
- Prepare cleaning materials: Use a soft, lint-free cloth or microfiber towel, along with a mild, non-abrasive cleaner recommended for radar sensors. Avoid using harsh chemicals or abrasive materials that could damage the sensor.
- Gently wipe the sensor surface: Carefully clean the radar sensor’s surface by lightly wiping it with the cloth or towel. Use gentle, circular motions to remove any dirt, dust, or debris. Take care not to apply excessive pressure or scrubbing.
- Remove stubborn debris if necessary: If there are stubborn particles or residue, you can dampen the cloth slightly with the recommended cleaner and gently wipe the sensor again. Avoid spraying or directly applying liquids to the sensor.
- Allow the sensor to dry: After cleaning, allow the sensor to air dry completely. Do not use any heat sources or compressed air to expedite the drying process.
- Verify cleanliness: Inspect the radar sensor to ensure that it is free from dirt, smudges, or any remaining debris.
It’s crucial to note that the radar sensor is a sensitive component, and any damage caused by improper cleaning can impact its functionality. If you are uncertain or uncomfortable with cleaning the radar sensor yourself, it is recommended to have it professionally cleaned or seek assistance from a qualified technician who is experienced with Mercedes vehicles.
Finally, a dirty or obstructed radar sensor can impair the vehicle’s ability to function properly and may even cause safety features to fail. If the driver notices a dirty radar sensor in the dashboard or instrument cluster, it is best to have it cleaned as soon as possible by a professional or by following the manufacturer’s instructions. If the sensor fails or is damaged, it must be replaced, which can be a time-consuming and expensive process.
Some related FAQs.
What does front radar sensor blocked?
If this symbol appears in the instrument panel, along with the message Radar sensor front Sensor blocked See Manual, it means that the radar sensor is unable to detect other vehicles, cyclists, pedestrians, or large animals in front of the vehicle, and that the vehicle’s radar-based functions may be obstructed.
Where are the radar sensors on Mercedes Sprinter?
The radar sensor in the front bumper calculates the ideal distance between the vehicle in front and the relative speed of the vehicles. This ensures that your van always maintains the required distance, and it can also automatically take over braking and pulling away.
Why is my forward collision warning light on?
Your Forward Collision Alert is alerting you that you are approaching another vehicle at an unsafe speed.
Where are the radar sensors on Mercedes Sprinter?
The Mercedes Sprinter’s radar sensor is typically located behind the front grille, either in the center or on the sides. It plays a crucial role in the vehicle’s safety features, such as adaptive cruise control and collision avoidance systems, by detecting objects and providing data to the onboard systems.