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Hi, my name is***** your mechanic automotive expert, and I will be happy to assist you today. In some cases, I may need more information to assist better. I apologize for any delay.
Dear customer, did this happened after the maintenance and service to the brakes?
Sorry for my delay dear customer. Dear customer, when this type of maintenance is carried out, the sensory area of the same is often touched, which causes your Mercedes to activate an error code that limits or disables part of the brake system, in this case the brake assist function, I don't know where you carried out this maintenance but normally when we carry out this type of procedure we must restore the data through a diagnostic equipment so that no type of error code or any indicator on the board remains lit.