E240 of 2005 has a brake system problem. It fails to break and a warning comes up which reads something like this: stop. reduced breaking power. depress brake pedal fully.

Hi Elkafidi, It would seem that the braking efficiency of your vehicle is impaired by one of the braking systems in the vehicle being contaminated with air. This could be due to leakage from one of the brake wheel cylinders or an external or internal leakage from the master cylinder. DO NOT DRIVE THE VEHICLE! Have the defect attended to! You will be able to see where the leakage is, by looking for stains of brake fluid. Look under the car at each wheel in turn and observe which of the wheels seems wet (on the inside). If there is no sign on the wheels, the leakage will be under the bonnet (hood). The master cylinder is mounted onto the servo brake vacuum unit. look for brake fluid stains there. The defect could also be caused by a leaking or broken flexible or solid brake pipe. This defect must be attended to urgently! Again I reiterate, do not drive the vehicle! Regards Johngee10

SOUNDS LIKE THE POWER UNIT OR MASTER CYLINDER FOR BRAKES HAS GONE BAD. NO MENTION OF PULLING OR GRINDING BUT YOU COULD NEED BRAKE FLUID. I'D CHECK THAT FIRST AND CHECK FOR LEAKS. HOPE THAT HELPS..