"Mercedes, and tier one supplier, Bosch, have been promoting their electrohydraulic technology for years", says ABI's research analyst Dan Benjamin. "Even before the recall, this was a complicated system where there were some complaints about usability. Drivers performing low-speed maneuvers have had their cars come to a sudden halt because the system 'thinks' it's seeing a panic stop."
The reason for the recall was the possibility of air-bubble contamination of the system's additional fluid reservoir.
"While electrohydraulic brakes do offer their advantages" added Benjamin, "they come at a great expense, while much of their additional functionality, such as hill-stop and panic braking, can be duplicated by more inexpensive systems."