Brakes Failed Problems of Mercedes Benz SL550

2017 Mercedes Benz sl500. Consumer writes in regard to brake failure.

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Tl the contact owns a 2007 mercedes-benz Sl550. While driving 35 mph, the contact experienced catastrophic brake failure. The brake pedal traveled to the floorboard when depressed. The contact had to coast the vehicle off the road and apply extreme force to the brake pedal to stop the vehicle. An emergency warning indicator flashed and various other warning indicators illuminated. The power steering became disabled when the failure occurred. The contact was able to restart the vehicle after several attempts and disabled the alarm system from the owner's manual. The vehicle was driven to the dealer (mercedes-benz of catonsville, 6631 baltimore national pike, catonsville, MD 21228, (410) 788-7744) where it was diagnosed that there was a sensotronic brake control (sbc) failure and that the sbc control pump needed to be replaced. The dealer was waiting for the manufacturer to authorize the part. The manufacturer was notified of the failure and indicated that they would provide a follow up response within 48 hours. The manufacturer issued 12 tsbs on the brake system and indicated that the vehicle was not included in a recall. The approximate failure mileage was 42,000.

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While driving at 50mph, audible and visual warnings of brake failure. No braking available other than transmission downshift for engine braking.

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The subject car, a 2008 mercdes benz Sl550, that has never been in an accident and is stored in a garage. The car was started and driven out of the garage on to the street, approximately 50 yards later while driving about 20 mph, the brakes 100% failed and the power assisted steering stop working. After coasting to a stop and placing the car in park. The brake pedal went all the way to the floor. The dash board flashed a stop sign symbol and a message that increase pedal pressure would be required. The car was turned off and restarted. At first the brakes and steering seem normal but after about 10 seconds, again the brakes and steering failed. At this point a tow truck was called and the vehicle was towed to a local mechanic. The car was inspected and the failure was repeated. The shop inspected the car and diagnosed the car with a computer. Several codes were apparent. The shop recommended that the brake system be flushed and the computer reset. The electrical system was inspected as well as the batteries. The car has been returned to service today. I am concerned that the brake system should not be designed in a way that a computer failure would render the brakes useless and fail 100%. If the brakes were to fail at higher speeds and in traffic, there could have been fatal results. My wife no longer feels safe driving this car.

The contact owns a 2007 Mercedes Benz Sl550. The contact stated that the brake failed to engage while driving 25 mph. The vehicle was towed to the dealer where a diagnostic was performed that determined that the braking system experienced a total failure. The braking system was replaced. The manufacturer was made aware of the failure. The VIN was not available. The failure and current mileage was 57,000.

The contact owns a 2009 Mercedes Benz Sl550. The contact stated that the brakes failed while traveling 35 mph and attempting to stop. The brake pedal was depressed into the floorboard. The vehicle was taken to the dealer and the contact was told that the hydraulic brake system failed and needed to be replaced. The vehicle was repaired between 12/27/11 and 12/28/11. The failure mileage was 13,892 and the current mileage is 15,000. Updated 03/28/lj updated 04/09/12 the consumer also stated the front grill, bumper and retractable roof were replaced. Updated evoq 04/10/12 updated evoq 05/08/12.

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