Follow these steps:
1. An OBD TOOL 16PIN connector into the vehicle's OBD-11 communications port;
2. Turn the ignition switch to ON, then OBD  SBC TOOL power light lit, and the device will call and the second tone, said the device is working properly;
3. And then need to restore the maintenance mode switch (25% -50% -75% -100% can be selected) 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/SBC TOOL (Repair Code C249F) for Mercedes Ben z cars have W211 and R230 with ABS SBC system.

The instruction as follows:
TIPS: CODE C249F, OPERATION TIME OF COMPONENT A7/3 IS EXCEEDED (SBC HYDRAULIC UNIT)
The above tips that show internal fault of control unit, you have to replace the SBC control module and using W211/R230 TOOL that can be easily repaired without replace the new control module.
For Mercedes Benz's 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 (SBC) system must be deactivated first using its STAR-DIAGNOSIS tester.
Deactivation of the SBC 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 SBC tool is another alternative to the STAR-DIAGNOSIS tester when working on SBC system. It can perform the tasks equally well which is efficient and safety.
After the repair had done, the SBC system can be activated and restore back its pressure. The memory is erased automatically.

Features:
Quick, easy operations with LED indications.
Safe to use
Power ON when plugged into vehicles OBDII diagnostic connector.
Light, compact and very convenient.
Stand alone unit.
This SBC tool works on W211 (E-Class) and R230 (SL-Class) with SBC systems.
It is ideally suited for:
Brake centers
Independent for Mercedes Ben z workshops
Tire Service centers
Service garages
Quick service centers
For Mercedes Ben z Specialist centers
Automotive Repair Workshops

SBC TOOL Support Type:
BOSCH NR: 0 265 960 012
BOSCH NR: 0 265 960 013
BOSCH NR: 0 265 960 015
BOSCH NR: 0 265 960 018
BOSCH NR: 0 265 960 019
BOSCH NR: 0 265 960 020
BOSCH NR: 0 265 960 023
BOSCH NR: 0 265 960 025
BOSCH NR: 0 265 960 028

Package Includes:
1* W211/R230 ABS/SBC Tool
1* OBD2 Cable
1* CD Software