dacollector

was driving 80 on the freeway, when all of a sudden, the abs light comes on, and ABS defective visit workshop, BAS defective visit workshop, ESP defective visit workshop.... WTF, all three now bad? what is BAS? is my brakes in jeopardy?

MARK CUMMINS

I Would have the car towed to the dealer ASAP




Re BAS

Here is what Mercedes-Benz says about it:
The Brake Assist System (BAS), an electronic system by Mercedes-Benz, interprets the braking behavior of the driver and initiates the full braking effect when it identifies an emergency situation. This reduces the braking distance substantially.

Here is the engineering foundation for BAS:

Conventional braking systems usually use engine vacuum to increase braking capability. Instead of relying solely on vacuum power to provide effective brakes, an electric pump pressurizes brake fluid to provide power assist for BAS and the necessary brake force for 4ETS.

The pressurized brake fluid is stored at about. 180 bar (2600 psi!) in a reservoir known as the accumulator. From the accumulator the high pressure brake fluid is supplied to the hydraulic operating cylinder in the master cylinder assembly. Commands to utilize the pressurized fluid comes from either 4ETS or BAS. When the brakes are applied and BAS deems it necessary, a lever connected to the brake pedal releases varying amounts of the high pressure fluid to assist in stopping the car.

Here is what BAS does for you:

Most drivers, under normal braking conditions as well as under emergency conditions, start out with little brake pressure and whenever necessary they will increase their pedal effort. In an emergency this behavior leads many times to a crash since the car could not be stopped in time. Those situations require maximum pedal pressure from the beginning - if necessary the effort can be reduced later in the process.

With other words most drivers do not use the ability of the brakes to their advantage - BAS automatically corrects that. The system recognizes emergency situations within milli seconds and releases pressurized brake fluid into the system as soon as the driver touches the brake pedal. As soon as the driver releases the brake pedal, BAS kicks back into a standby mode.

BAS creates a much higher stopping force for emergencies than most drivers are ever able to generate. By doing so BAS helps to prevent accidents


Just another good reason to drive a car made by Mercedes-Benz

dacollector

thanks mark,
i called the dealer and he said make an appt. which i did, and that it was ok to drive??? my appt is not till the 26th? is my life in jeapordy?

dacollector

went to drive off to get lunch and the abs light went off and no more malfunctions???? is there gremlins in these cars? should i still take it in to check?

Barry45RPM

Yes. Take it in.

E500Newbee

take it in, my car was like that too. EPS malfunction visit workshop...and started to bounces. I was doing 60 and taking a corner on a highway exiting to another highway. Was a scary moment. Took it in, upgraded the code and now it's good.