An OBD for TOOL 16PIN connector into the vehicle's OBD-11 communications port;Turn the ignition switch to ON, then OBD for TOOL power light lit, and the device will call and the second tone, said the device is working properly;and then need to the maintenance mode switch (25% -50% -75% -100% can be ) at this time there will be frequency indicator light, and the device will beep tones, 10 seconds to complete data , whichAlways when the 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 show internal fault of control unit, you have to replace the control module and using W211/R230 TOOL can be easily repaired without replace the new control module.For - Safety Precautions had stated attempting to repair the brake system on models W211 (E ) and R230 (SL ), the Sensotronic Brake Control () system must be deactivated first using STAR-DIAGNOSIS tester.Deactivation of the system is necessary carrying out any maintenance work onthe brakes like changing of pads, discs and fluids because the system is under a pressure of 140 . Mechanics who brake services on these car models must have the 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 the tasks equally which is efficient and safety.Colour:blueMaterial:Plastic + Electronic ComponentsPackage Contents:1 x W211/R230 ABS/ Tool1 x OBD2 Cable1 x CD SoftwareOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.