Brake Wear

Discussion in 'Wheels, Tyres, Brakes & Suspension' started by engtechst, Apr 8, 2014.

  1. engtechst

    engtechst New Member

    Messages:
    2
    Joined:
    Aug 30, 2013
    Location:
    Hampshire
    Car:
    E350CGi and R320CDi
    I had my E350 serviced (B Service) in Jan (30,000 miles) and informed that I had about 20% left on the front brake pads, in Mar 2,000 miles later the warning light came on so I arranged for pad replacement at the dealer.

    I had a look and felt the edges of the discs and thought I would measure them with a micrometer, 30.04mm I understand the wear limit is 30mm

    I was surprised that the dealer did not tell me that the discs were wearing down when I had the car serviced in Jan. On asking I was told that "they give the discs a visual inspection on the B service, and would only measure them when changing pads"
    I find it hard to believe that they do not actually measure them during a service, am I wrong in this, or are they blowing me smoke?

    I have no problem spending money on service or brakes, I just expect a higher standard of work.
     
  2. st13phil

    st13phil MB Club Veteran

    Messages:
    6,307
    Joined:
    Nov 6, 2007
    Location:
    North Oxfordshire
    Car:
    His - Diamond White W212 E63 Biturbo with Night Package / Hers - Obsidian Black R172 SLK55
    The wear limit will include a safety margin, sufficient I suspect to cover the likely wear during the life of a set of pads. As such, measuring disc thickness other than at the time pads are changed would be unnecessary unless some other brake fault such as judder or a pulsing brake pedal had been reported.
     
    1 person likes this.
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