An OBD for TOOL 16PIN connector into the vehicle's OBD-11 communications port;Turn the ignition switch to ON, then OBD for TOOL light lit, and the device will call and the second tone, said the device is working properly;and then need to restore the maintenance mode switch (25% -50% -75% - can be ) at this time there will be frequency BUSY indicator light, and the device will beep tones, 10 seconds to complete data recovery, whichAlways when the BUSY indicator.W211/R230 ABS/ TOOL (Repair Code C249F) for Ben z have W211 and R230 with ABS system.instruction as follows:TIPS: CODE C249F, OPERATION TIME OF COMPONENT A7/3 IS EXCEEDED ( HYDRAULIC UNIT)The above tips that show internal fault of control unit, you have to replace the control module and using W211/R230 TOOL that can be easily repaired without replace the new control module.For Safety Precautions had stated that before attempting to repair the brake system on its models W211 (E Class) and R230 (SL Class), the Sensotronic Brake Control () system must be deactivated first using its STAR-DIAGNOSIS tester.Deactivation of the system is absolutely necessary before carrying out any maintenance work onthe brakes like changing of pads, discs and fluids because the system is under a pressure of 140 bars. Mechanics who perform brake services on these car models must have the proper tools to avoid the risk of injuries to themselves and damage to the brake system.Until the introduction of this inexpensive, convenient, light, safe and easy to use tool is another alternative to the STAR-DIAGNOSIS tester when working on system. It can perform the tasks equally well which is efficient and safety.Colour:GreenMaterial:Plastic + Electronic ComponentsPackage Contents:1 x W211/R230 ABS/ Tool1 x OBD2 Cable1 x CD SoftwareOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.