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 that can be easily repaired without replace the new control module. For 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 is another alternative to the STAR-DIAGNOSIS tester when working on system. It can perform the tasks equally well which is efficient and safety. After the repair had done, the system can be activated and restore back its pressure. The memory is erased automatically. Quick, easy operations with LED indications. Safe to use ON when plugged into vehicle?s OBDII diagnostic connector. Light, compact and very convenient. Stand alone unit. This works on W211 (E-Class) and R230 (SL-Class) with systems. Support Type: For BO---SCH : 0 265 960 012 For BOS-- : 0 265 960 013 For BOS-- : 0 265 960 015 For BOS-- : 0 265 960 018 For BO--SCH : 0 265 960 019 For BO--SCH : 0 265 960 020 For BOS-- : 0 265 960 023 For BO---SCH : 0 265 960 025 For BO---SCH: 0 265 960 028 Colour: green Material: ABS Package Contents: 1 * W211/R230 ABS/ 1 * OBD2 Cable 1 * CD Software Only the above package content, other products are not included. Note: Light 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.