2006 Mercedes E-Class Owner's Manual - Page 100

Safety and Security Driving safety systems The electrohydraulic brake servo assistance switches off automatically approximately 2 minutes after you turned the SmartKey in the starter switch to position 0 or removed the SmartKey approximately 2 minutes after you pressed the KEYLESS-GO* start/stop button to turn off the engine or power supply and opened the driver's door (with driver's door open, the starter switch is set to position 0, same as SmartKey removed from starter switch) approximately 20 seconds after you locked the vehicle from outside. Note on driving with the electrohydraulic brake system Following extended periods of only minor loads to your brake system, you should occasionally apply the brakes when traveling at high speeds. This improves the grip of the brake pads. Warning! Warning! G Have brake pad replacement and other work on the electrohydraulic brake system carried out by qualified technicians only. Contact an authorized Mercedes-Benz Center for further information. The electrohydraulic brake system must be deactivated prior to working on the system. High pressure is intermittently built up in the system as part of its automatic self-test. In addition, the system is automatically activated when the vehicle is unlocked by SmartKey, when the driver or passenger door is opened, when the starter switch is turned to position 1, when the brake pedal is depressed or when the parking brake is released. Failure to deactivate the system prior to maintenance will cause brake pistons to extend and brake fluid to leak, which may result in injuries (contusions and acid burns). Extended brake pistons may also cause injury. G Be very careful not to endanger other road users when you apply the brakes. After driving on wet or snow-covered roads, you should apply your brakes firmly before parking your vehicle. This produces heat which serves to dry the brake disks and help prevent corrosion. On long and steep grades, shift to a lower gear (gear range 1, 2, or 3) to prevent the brakes from overheating and to reduce brake wear. 99