Active Daylight for Mercedes Benz Service

Many Mercedes-Benz models come equipped with Daytime Running Lights (DRL) to enhance visibility and driving safety. However, in some cases, these lights may not be activated by default or may be deactivated during retrofits or module replacements. If you’re wondering how to turn on daylight or DRL for your Mercedes-Benz, this guide will walk you through the activation process using diagnostic tools and proper coding methods. Whether you’re using Vediamo, DTS Monaco, or XENTRY, we’ll show you the safe and correct way to enable this feature.

Why Activate Daylight for Mercedes-Benz?

Activating the daylight feature, also known as Daytime Running Lights (DRL), is more than just a visual upgrade—it plays a key role in both safety and vehicle compliance. Here are several reasons why enabling DRL is important for your Mercedes-Benz:

1. Enhanced Road Visibility

Daylight running lights improve your vehicle’s visibility during daylight hours, especially in low-light conditions such as fog, rain, or shaded roads. Other drivers, cyclists, and pedestrians are more likely to see your vehicle, reducing the risk of accidents.

2. Compliance With Regional Regulations

In many countries and regions, DRL is a legal requirement. Vehicles without activated DRL may not pass periodic inspections or may violate road safety regulations. Activating this function ensures your Mercedes complies with local traffic laws.

3. Safety-Oriented Design

Mercedes-Benz designs its lighting systems with safety in mind. DRLs are engineered to work in harmony with the vehicle’s main lighting system to ensure optimal illumination without blinding other drivers. Activation restores factory-intended safety functionality.

4. Restores Function After Module Replacement

If the front SAM (Signal Acquisition Module) or headlight control unit has been replaced or reprogrammed, the DRL setting may revert to its default state—often disabled. Reactivating the daylight function ensures the vehicle’s lighting behaves as designed.

5. Aesthetic and Brand Consistency

Mercedes-Benz is known for its premium appearance. Enabling the DRL function helps maintain the car’s modern and high-tech look, matching the signature visual style of the brand’s lighting architecture.

6. Avoid Dashboard Warning Lights

Some vehicles may show lighting-related warning messages if DRL functions are incorrectly configured or disabled. Proper activation via coding clears these warnings and ensures smooth operation.

Tools Required to Activate Daylight for Mercedes-Benz

To successfully activate the daylight (DRL) function on your Mercedes-Benz, you’ll need specific diagnostic tools and software. These tools allow access to the vehicle’s control modules where the DRL feature can be enabled through coding or adaptation. Below is a list of essential tools:

1. Mercedes-Benz Diagnostic Interface (VCI)

You will need a compatible vehicle communication interface to connect your laptop to the vehicle. The most commonly used devices include:

• C4 (SD Connect)

• C5

• C6 OEM DOIP

• VXDIAG C6 or Openport 2.0 (for basic simulation tasks)

2. Laptop with Windows OS

A Windows-based laptop (Windows 10 or 11, 64-bit) is required to run the diagnostic software. Recommended specifications:

• Intel Core i5 or higher

• Minimum 8GB RAM

• SSD with at least 100GB free space

3. Diagnostic Software

The following software tools are used to access and modify the daylight (DRL) settings:

• Vediamo – Used for offline coding of individual control units (e.g., SAMF, N10/1).

• DTS Monaco – Advanced coding and flashing tool for engineers; useful for newer vehicles.

• XENTRY Diagnosis – OEM diagnostic software from Mercedes-Benz; used to confirm coding status and perform adaptations.

4. Power Supply (Optional but Recommended)

Using a 12V battery charger or power stabilizer ensures the voltage stays stable during coding, especially for newer models or when working for extended periods.

5. Wiring Diagrams or Access to WIS/ASRA (Optional)

For some models, referencing wiring diagrams or factory repair instructions may help identify the correct control unit and function location for DRL settings.

Step-by-Step Guide to Activate Daylight for Mercedes-Benz

Step 1: Prepare Required Tools

Ensure the following are ready:

• Diagnostic laptop (Windows 10/11)
• VCI (e.g., SD C4, C6 DOIP)
• Software: Vediamo, DTS Monaco, or XENTRY
• Stable 12V power supply (recommended)

Step 2: Identify the Correct Control Unit

Depending on your model, DRL settings are usually located in one of the following control units:

• SAM-F (Front Signal Acquisition and Actuation Module)
• N10/1 or N10/2 (Body Control Module)
• Headlight Control Unit (HLI) – For vehicles with ILS or MULTIBEAM systems
• Use XENTRY to perform an initial diagnostic scan and confirm the control unit responsible for the daylight function.

Step 3: Connect to the Vehicle

• Connect the VCI to your car’s OBD-II port.
• Open Vediamo or DTS Monaco and select the correct ECU (e.g., SAMF_212, N10_1, HLI166, etc.).
• Establish communication with the ECU.

Step 4: Read and Modify Coding Parameters

In Vediamo:

• Open the Coding tab (Codierung) or EIS/Coding Daten.
• Look for parameters related to TFL (Tagfahrlicht), DRL, or Daylight Running Light.
• Set the value to “Ein” (ON) or “Active” depending on the language and software version.

In DTS Monaco:

• Load the ECU project file.
• Navigate to Variant Coding or Coded Data Blocks.
• Modify the TFL-related coding bits from OFF to ON or change bit values as required.

Step 5: Save Coding and Reboot the ECU

After modifying and saving the new values:

• Use the software’s function to write coding back to the ECU.
• Clear any fault codes (if present).
• Perform a reset or ignition cycle to confirm changes.

Step 6: Verify Functionality

• Turn on the vehicle and observe whether the DRLs illuminate with ignition ON.
• Check vehicle settings in the instrument cluster (some models allow DRL toggling in the menu).

Notes:

• Always back up the original coding before making changes.
• Some newer Mercedes-Benz models may also require online SCN coding. If so, contact a professional or use your Daimler XENTRY login.
• If you are unsure about a parameter, consult the WIS/ASRA or seek help from experienced coders.

VCCarTool Daylight Activation Service for Mercedes-Benz

At VCCarTool, we offer a fast, secure, and remote daylight running light (DRL) activation service for all compatible Mercedes-Benz models. Whether you’re retrofitting headlights or simply want the DRL feature turned on, our certified technicians can remotely code your vehicle using advanced tools like Vediamo, DTS Monaco, and XENTRY.

What We Offer:

• Remote DRL activation for all models up to 2020 (some 2021 supported)
• Safe coding through OEM-level software
• Support for SAMF, N10/1, HLI, and other relevant control units
• Step-by-step guidance or full remote session
• 24/7 technical support via WhatsApp or TeamViewer

By choosing VCCarTool, you ensure that your Mercedes-Benz’s daylight running lights are activated safely, professionally, and in compliance with factory standards. Whether you’re upgrading your lighting system or restoring default functions, our remote service guarantees fast and reliable results. Contact us via WhatsApp: +1 (901) 414-1927 today to schedule your DRL coding session and experience expert support wherever you are.