|
Hi ferstertech,
I have a '87 420, and I believe the brakes are the same as yours.
Based on the MB-CD (Section 4251 in CD) , the rotors have an original thickness of 28 mm and a limit at service of 26 mm. The wear limit for proper operation is 25.4 mm.
A lip at the edge develops with use and the thickness of the lip kind of tells you how used the rotors are. They wear more in the middle, so if you have a 2 mm lip, its time to measure.
If the rotor is still above 26 mm, you simply replace the brake pads and the sensors.
Do a search or look at the D.I.Y block on top of this page. There is also a lot of opinions about which pads to choose. I used PBR deluxe, as they don't create as much dust. Braking is fine with them, too. You can get them from this site, together with the sensors and anti-squeal paste. I used Valvoline Synpower brake fluid, which was also recommended here before.
If you feel comfortable with wrenching, it is an easy job. However, you can always run into the unexpected, i.e. a sticky dust seal at the caliper that will tear when you pull the pad off or bad looking rubber hoses. With a 17 year old car, surprises happen...
This is how it will look when you take off the wheel...
Good luck
Reinhard Kreutzer
|