How to Remove the Speed Limiter on a Mercedes via Vediamo/DTS Monaco

If you drive a Mercedes-Benz, you may have encountered a speed limiter that restricts how fast your vehicle can go. Whether you’re a performance enthusiast or simply want to remove factory restrictions, this guide will show you exactly how to remove the speed limiter on a Mercedes using professional diagnostic tools — DTS Monaco and Vediamo.

---

1. Why Remove the Speed Limiter on a Mercedes?

Mercedes-Benz vehicles often come with a factory-set speed limit, commonly known as Vmax (Velocity Maximum). This is especially true for models like:

• Mercedes Sprinter (BR906) – typically limited to 132 km/h

• Luxury sedans and SUVs – capped at 250 km/h even with powerful engines

There are several reasons drivers and tuners seek Mercedes speed limiter removal:

• Full engine performance utilization

• Driving on unrestricted highways (e.g., Autobahn)

• Removing fleet or country-specific restrictions

• Preparing for track use or special circumstances

---

⚠️ Disclaimer:

This guide is for educational purposes only. Always ensure that any speed limiter removal complies with local laws and safety regulations. Improper modifications may void warranties or impact insurance coverage.

---

⚠️ Is It Legal to Remove the Speed Limiter?

Important Note: Removing the speed limiter is not legal for public road use in many countries. It may void your warranty, impact your insurance coverage, or violate vehicle certification. However, it’s commonly done for:

• Motorsport and track use

• Research and development

• Export vehicles

• Private property usage

2. Tools You Need

To remove or change the speed limit on your Mercedes, you need one of the following tools:

🧰 Hardware Requirements

• A compatible VCI (Vehicle Communication Interface) such as:

  • SDconnect C4 or C5

  • VXDIAG C6 (with full DoIP support)

  • Openport 2.0 (for basic access but limited support)

• A stable laptop running Windows OS (preferably Win 7/10, 64-bit)

• An OBD2-to-VCI cable

• 12V battery charger or maintainer (important for safety during long sessions)

💻 Software Options: Vediamo or DTS Monaco

✅ If your car is 2016 or older, you’re likely better off using Vediamo.
✅ If your car is 2017 or newer, especially with DoIP, use DTS Monaco.

=> Download Vediamo software here

=> Download DTS Monaco here

🔍 ECU Project Files (Important)

You’ll also need the correct ECU project files (.SMR-D/.CBF/.CFF), specific to your vehicle’s control unit:

• ME97.cff for many Sprinter (BR906) and other commercial models

• MED177.cff or MED40.cff for newer gasoline engines

• CRD3.cff for newer diesel ECUs

=> You can contact AutoExplain via whatsapp (+84)967469410 for advice

---

3. How to Remove Speed Limiter via DTS Monaco (car 2017 or newer)

### Step-by-Step Instructions

Step 1: Connect DTS Monaco to Your Vehicle

• Launch DTS Monaco on your PC.

• Connect the VCI to your Mercedes-Benz OBDII port.

• Select the project “ME97” to communicate with the engine ECU.

Step 2: Unlock the ECU

• Navigate to the “Diajob” tab.

• Press “Zugriffsberechtigung 1” and “Zugriffsberechtigung 2” to gain access to coding features.

Step 3: Access Variant Coding

• Go to the “Variant Coding” tab.

• In the “Domäne”, select “implizite Kodierung ME97”.

• Locate the “Vmax” parameter.

• Change the value to 250km/h BR906: 132 km/h or your preferred speed.

Step 4: Perform a Hard Reset

• Restart the ECU or vehicle to apply changes.

• Verify the speed limit is removed.

---

4. How to Remove Speed Limiter via Vediamo (W251 Example)

Vediamo offers a more manual interface but works efficiently for variant coding.

### Step-by-Step Instructions

Step 1: Connect Vediamo to Your Vehicle

• Plug the VCI into the vehicle and connect to your PC with Vediamo installed.

Step 2: Select the Target ECU

• Choose ECU “ME97” from the control unit list.

Step 3: Unlock the ECU

• Navigate to the “Function” menu.

• Double-click “DJ_Zugriffsberechtigung” to unlock variant coding functions.

Step 4: Access Variant Coding

• Go to “Coding Variant”.

• Choose “implicit_Coding_ME97” or a similar function based on your ECU.

Step 5: Modify the Vmax Parameter

• Choose “250 km/h / BR 906: 132 km/h” or desired limit.

• Save and click “ECU Coding” to apply.

---

5. Safety Tips

• Always keep the battery voltage stable above 12.5V

• Backup your ECU coding before making changes

• Never interrupt the process—doing so could brick the ECU

• Use professional tools and avoid cheap knockoff cables

6. Supported Mercedes Models

Here are some vehicles where Vmax coding has been successfully done:

• Vehicle Unlock Hidden Features Service 
• ECU Programming Service