In general, you should inspect your brake pads about every 25,000 miles or once a year, whichever is less, and replace them if the material lining of the pad is worn down enough to trigger the pad replacement sensor or there is less than a quarter inch of material on the pad. In reality, most people don't inspect their pads very often, and usually wait until they see the little brake-warning lamp appear on the dashboard or hear a squeaking noise when they apply their brakes.
If you let the pads wear down enough you will get to the point of metal on metal contact, where the metal backing of the pads are contacting the brake discs. Using the brakes during this condition will not only give you very dangerous and inadequate braking, but will also begin to wear grooves in your brake discs. Once the discs are grooved, they are damaged and if you have drilled or slotted rotors there is no way to repair them. The smart thing to do is to avoid this problem and replace at the correct times.
Safely jack up and support the front of the vehicle and remove the front wheels. Please see our article on safely lifting and supporting your Mercedes W123.
Brake pads should always be replaced in pairs. If you have not bled your brakes in a while this is a good time to give them a good bleed and get fresh fluid in the system. Please see our article on bleeding your brakes.
Read the Full Article:
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Time: 2 hours
Tab: $25 to $55
Tools: Punch:[ Ссылка ], hammer:[ Ссылка ], pliers:[ Ссылка ], flathead screwdriver:[ Ссылка ]
Applicable Models: Mercedes-Benz W123 (1977-85):[ Ссылка ]
Parts Required: New pads:[ Ссылка ]
Hot Tip: Clean the caliper mounting surfaces
Performance Gain: Car stops better
Complementary Modification: Replace Rotor or disk: [ Ссылка ]
