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  1. Car
    2. :
  2. Mercedes
    3. :
  3. Classe E
    4. : Disassembly and replacement of the brake disc and rear pads

Mercedes Classe E - Video tutorial

Model: Mercedes Classe E W124 - Years 1984-1995
Part: Brake discs
Operation: Disassembly and replacement of the brake disc and rear pads

First of all, the car must be lifted using a jack (to be applied in correspondence with the wheel on which it is to be used) or a lift. Once the car has been raised, disassemble the wheel fixing pins using a pneumatic screwdriver and remove the wheel itself: it is possible to immediately notice the wear of the disc and the considerable reduction in thickness. At this point, locate the two holes on the brake calliper and with the aid of a pin punch and hammer, extract the fixing pins of the pads and the sealing spring. With an expansion caliper, space the pads so that the piston is fully retracted and create the accommodation for the new pads which, clearly, will have a much greater thickness. Loosen the two pins securing the rear brake caliper and remove it so that the disc can be freely extracted. The disc is fixed to the hub by means of a hexagonal head pin positioned near one of the threaded holes for the wheel fixing pins: once the hexagonal pin has been loosened it is possible to remove the disc and note the presence of the jaws (in the case of the car in question, in fact, the disc also acts as a drum). Before positioning the new disc, however, it is advisable to clean the hub of any oxidation residues (with sandpaper or a wire brush), to apply grease to prevent the new formation of rust and to clean the disc itself with solvent. to eliminate any residues of passivating oil (it is an oil that is applied by the manufacturer to prevent the discs from oxidizing during the period of storage in the warehouse). Once the new disc has been applied, center the threaded hole on the hub and carefully tighten the hexagonal fixing pin. At this point, reposition the caliper and tighten the relative fixing pins. Insert the new pads (having, if necessary, previously treated with a specific anti-adhesive spray) and, after having carefully brushed them, insert the upper pin, then the sealing spring (under the pin) and the lower pin. Finally, using a pin punch and a hammer, knock the pins down to allow them to be properly anchored. Reposition the wheel, lock the fixing pins with the pneumatic screwdriver and, after lowering the car, recheck the tightness with the dynamomotive wrench. Remember to pump on the brake pedal until it opposes the right resistance to reposition the brake caliper actuating piston and clearly to pay attention to the first braking as a minimum of running-in will be necessary before obtaining maximum efficiency from the newly overhauled braking system.


Posted on 23 June 2023 by ScegliAuto



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by ScegliAuto

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