Introduction
The iCarsoft MB V4.0 is a professional full-system bidirectional diagnostic scan tool designed for comprehensive vehicle diagnostics. It supports Mercedes-Benz, Sprinter, and Smart vehicles from 1996-2023, and allows for the download of two additional car brand software packages from a selection of 26 available options. This tool provides OE-level system diagnosis, powerful bi-directional control, up to 42 maintenance reset services, and full OBD2 functions, enabling efficient troubleshooting and maintenance.

Figure 1: The iCarsoft MB V4.0 diagnostic scan tool, showcasing its main interface with various function icons.
What's in the Box
Upon opening your iCarsoft MB V4.0 package, please verify that all the following components are included:
- 1X iCarsoft MB V4.0 OBD2 Scanner for Mercedes
- 1X Power Adapter
- 1X User Manual
- 1X 16 Pin OBD2 Diagnostic Cable

Figure 2: All items included in the iCarsoft MB V4.0 product package.
Key Features
The iCarsoft MB V4.0 offers a robust set of features for comprehensive vehicle diagnostics and maintenance:
- Expanded Vehicle Compatibility: Designed for Mercedes-Benz, Sprinter, and Smart vehicles (1996-2023), with the flexibility to download software for two additional car brands from a selection of 26.
- OE-Level All Systems Diagnosis: Performs in-depth diagnostics on all vehicle systems and components, identifying faults and potential issues.
- Powerful Bi-directional Control: Enables active tests to send commands to various components (e.g., injectors, fuel pump, ABS pump motor) to verify their operational status.
- Extensive Service Functions: Provides up to 42 popular reset services for Mercedes-Benz/Sprinter/Smart, including Oil Reset, SAS, EPB, ETC, TPMS Reset, ABS, Suspension, and more. Also includes VIN Verification and Mileage Verification.
- Full OBD2 Functions: Supports all 10 OBD2 test modes, including reading/clearing codes, live data stream, freeze frame data, O2 sensor test, EVAP system test, and I/M readiness.
- Lifetime Software Updates & Hardware Repair: Benefits from free lifetime software updates and free lifetime hardware repair, backed by a 1-year warranty.
Setup
Initial Power-Up
- Connect the provided power adapter to the scan tool and a power outlet, or connect the OBD2 diagnostic cable to a vehicle's OBD2 port (vehicle ignition must be on).
- The device will power on automatically. Follow the on-screen prompts to select your preferred language, time zone, and other initial settings.
Connecting to Vehicle
Locate the 16-pin OBD2 diagnostic port in your vehicle, typically found under the dashboard on the driver's side. Connect the provided OBD2 diagnostic cable firmly to this port and to the iCarsoft MB V4.0 scan tool.
Software Update and Brand Package Download
To ensure optimal performance and access to the latest features and vehicle coverage, it is recommended to update the software and download any necessary brand packages.
- Connect the iCarsoft MB V4.0 to a stable Wi-Fi network via the 'Settings' menu.
- Navigate to the 'Upgrade' section on the main menu.
- Log in with your registered account details.
- The system will display available updates and a list of additional car brands. You can select up to two extra car brands to download. Important Note: Once an extra brand package is downloaded, it cannot be changed or removed. Choose carefully based on your diagnostic needs.
- Confirm your selections to begin the download and installation process. Ensure a stable internet connection throughout.
Video 1: This video demonstrates the iCarsoft MB V4.0's one-click Wi-Fi update process and how to download additional brand packages for expanded vehicle compatibility.
Operating Instructions
Full System Diagnosis
The tool can perform a comprehensive scan of all available electronic control units (ECUs) in the vehicle.
- From the main menu, select 'Diagnostics'.
- The tool will automatically identify the vehicle's VIN (Vehicle Identification Number) and initiate a full system scan. If auto VIN fails, you may need to manually select the vehicle make, model, and year.
- Review the diagnostic trouble codes (DTCs) and system status reports generated by the scan.

Figure 3: The iCarsoft MB V4.0 displaying an in-depth full-systems diagnostic overview, highlighting various vehicle systems.
Bi-directional Control (Active Tests)
Bi-directional control allows you to send commands from the scan tool to the vehicle's ECUs to test specific components or systems.
- After selecting 'Diagnostics' and identifying the vehicle, navigate to the 'Actuation Test' or 'Bi-directional Control' menu.
- Select the component you wish to test (e.g., injector, fuel pump, ABS pump motor, cooling fan, window, headlight).
- Follow the on-screen instructions to activate or deactivate the component and observe its response. This helps in quickly pinpointing faulty parts.

Figure 4: A user performing an in-depth actuation test using the iCarsoft MB V4.0, demonstrating its bi-directional control capabilities.
Maintenance and Service Functions
The iCarsoft MB V4.0 provides a wide array of maintenance and reset services to assist with common vehicle repairs and adjustments.
- From the main menu, select 'Service'.
- Choose the desired service function from the list (e.g., Oil Reset, Electronic Parking Brake (EPB) Reset, Steering Angle Sensor (SAS) Calibration, Diesel Particulate Filter (DPF) Regeneration, Injector Coding, Battery Management System (BMS) Reset, Throttle Position Actuator Reset, TPMS Reset, ABS Bleeding, Suspension Adjustment, Air Conditioner Reset, Head Lamp Reset, Body Stability Control, Engine Control, Seat, Fuel Pump, Air-Filter, Door, Transmission, Miscellaneous, Clutch, Seat Belt, Cruise Control System, Crankshaft, Language Setting, VIN Verification, Mileage Verification).
- Follow the on-screen prompts to complete the service procedure.

Figure 5: A visual representation of the 38+ maintenance reset services and 26 special functions offered by the iCarsoft MB V4.0.

Figure 6: The iCarsoft MB V4.0 displaying unique service functions for specific vehicle brands like Porsche, Volvo, BMW, and Jaguar/Land Rover.
Full OBD2 Functions
The iCarsoft MB V4.0 supports all standard OBD2 diagnostic functions for emissions-related issues.
- Read & Clear Codes: Retrieve generic and manufacturer-specific diagnostic trouble codes (DTCs) and clear them to turn off the Malfunction Indicator Lamp (MIL).
- Live Data Stream: View real-time data parameters from the vehicle's sensors and components in text or graph format.
- Freeze Frame Data: Capture a snapshot of vehicle operating conditions at the time a fault code was set.
- I/M Readiness: Check the status of emission-related monitors to determine if the vehicle is ready for an emissions test.
- O2 Sensor Test: Retrieve O2 sensor monitoring test results.
- EVAP System Test: Initiate a test of the evaporative emission control system.
- On-Board Monitoring: Access results of on-board diagnostic monitoring tests for specific components/systems.
- Vehicle Information: Retrieve vehicle identification information (VIN, Cal ID, CVN).

Figure 7: The iCarsoft MB V4.0 showing its comprehensive full OBD2 diagnostic functions.
Data Display and Analysis
The tool supports 4-in-1 PIDs graphing, allowing you to view and compare multiple live data streams simultaneously for in-depth analysis.

Figure 8: The iCarsoft MB V4.0 displaying real-time 4-in-1 PIDs graphing for detailed data analysis.
Maintenance
Proper maintenance of your iCarsoft MB V4.0 scan tool ensures its longevity and reliable performance.
- Cleaning: Use a soft, damp cloth to clean the screen and exterior of the device. Avoid abrasive cleaners or solvents.
- Storage: Store the tool in its protective case in a dry, cool environment away from direct sunlight and extreme temperatures.
- Software Updates: Regularly check for and install software updates via Wi-Fi to ensure the tool has the latest vehicle coverage and diagnostic capabilities.
- Cable Care: Inspect the OBD2 cable for any signs of damage before each use. Avoid bending or twisting the cable excessively.
Troubleshooting
If you encounter issues with your iCarsoft MB V4.0, refer to the following common troubleshooting tips:
- Device Not Powering On: Ensure the OBD2 cable is securely connected to the vehicle's diagnostic port and the vehicle's ignition is on. Alternatively, connect the power adapter to a wall outlet. Check if the device battery is charged.
- Communication Error with Vehicle: Verify that the OBD2 cable is properly connected to both the tool and the vehicle. Ensure the vehicle's ignition is in the 'ON' position (engine off or running, depending on the test). Confirm that the vehicle make, model, and year selected on the tool match your vehicle.
- Specific Function Not Supported: Not all vehicle models are equipped with a complete set of ECUs, and some functions may not be supported on certain models. Always verify compatibility for specific service functions with your vehicle's VIN before purchase or attempting the function.
- Slow Operation or Freezing: Ensure the device software is up to date. If the issue persists, try restarting the device.
- Software Update Issues: Check your Wi-Fi connection and ensure it is stable. Verify your login credentials for the update server. If the issue persists, try updating at a different time or location with a stronger internet connection.
Specifications
Key technical specifications for the iCarsoft MB V4.0 diagnostic scan tool:
| Brand | iCarsoft |
| Model Number | MB V4.0 |
| Power Source | Battery Powered |
| Operating System | Android 8.1 |
| Screen Size | 5 Inches |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 810192671786 |
Warranty and Support
iCarsoft is committed to providing reliable products and customer satisfaction.
- Manufacturer Warranty: The iCarsoft MB V4.0 comes with a 1-year manufacturer warranty.
- Software Updates: Enjoy lifetime free software updates to keep your tool current with the latest vehicle models and diagnostic functions.
- Hardware Repair: Lifetime free hardware repair is offered for the device.
For technical assistance, warranty claims, or any product-related inquiries, please contact iCarsoft customer support through their official website or the contact information provided in your product packaging.