If you remember with the launch of the SL in 2002, and then the higher versions of the E Class, Mercedes-Benz introduced Sensotronic Brake Control (SBC). A revolutionnary braking system with a pump, and pressure reservoir to enhance braking, on the premise that most folks would never apply the level of pressure even with a power brake to shorten brake distances.
In 2003 the E500 had SBC brakes, and an air suspension. Neither of these are inexpensive systems to repair.
In the case of Walter, when lining up for an apex, SBC does a phenomenal job to scrub off speed in a short distance. Brake in a straight line and hit the apex...Walter never misses a beat.
The downside of SBC brakes is that they are complex to service, even performing a brake job (replacing pads) is an undertaking the brake system needs to be de activated with the DAS. Bleeding the brakes is an experience in its own. Not surprising Mercedes discontinued SBC brakes after a few years.
Some weeks ago Walter decides to get cranky, lights up the dash in red, yes the SBC pump is acting up. The car still brakes but in a different fashion that when the pump is working. If you have a car with SBC brakes and the dash lights up red, be very cautious, there is a reason its red and it does not go away.
Keep in mind that you are used to braking with increased pressure from the pump. The messages in the dash bluntly tell you what the car will do - reduced braking effect - longer braking distances. Not recommended to drive the car.
Its an older car, it fell in love with flat beds last year, to start 2015 its the SBC pump. A perfect OUCH moment of nothing will be inexpensive to repair.
Bring the car to a Mercedes-Benz dealer the warranty on the SBC system has been extended to 15 years, from the previous 10 years. In our case Walter is out of the 10 year time frame.
Yes...there is a silver lining in the SBC brake cloud.