An OBD2 tool with a 16-pin connector designed to plug into the vehicle's OBD-II port. Turn the ignition switch to ON; the tool's indicator light will illuminate and emit two beeps, indicating the device is functioning properly. This tool allows users to reset the maintenance mode switch (with options at 25%, 50%, 75%, and 100%). During reset, the BUSY indicator light will flash and the device will beep; data recovery completes within 10 seconds while the BUSY light remains active.Compatible with W211 and R230 models equipped with ABS systems. Addresses repair code C249F: "Operation time of component A7/3 exceeded" (hydraulic unit), which indicates an internal control unit fault. This tool enables repair without replacing the control module.For safety, it is recommended to deactivate the Sensotronic Brake Control system before performing brake maintenance on W211 (E-Class) and R230 (SL-Class) models. System deactivation is required prior to pad, rotor, or fluid replacement due to high pressure (up to 140 bars) in the brake system. Proper tools are essential to prevent personal injury or damage to the brake system.This lightweight, safe, and easy-to-use device offers a cost-effective alternative to the STAR-DIAGNOSIS tester, performing the same functions efficiently and safely.Color: Green Material: Plastic + Electronic Components Package Contents: 1 x W211/R230 ABS Tool 1 x OBD2 Cable 1 x CD Software Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.