brake job
 

hello, how much should it cost to replace brake pads and rotor for front and rear for a 87 300E?
i live in ontario,canada

If you can DIY, there's a great FAQ available.
E Class Brake Pad Replacement

Rotors are easy as well, but not sure if the bearings have to come off on the 124s. Anyone?

The whole job shouldnt take more than a few hrs.

I don't know what it would cost as I've always done my own brake work...

I also did the work myself and paid $60 a piece for new front disc rotors, $49 a pair for the front disc pads, and $11 a piece for new wear sensors at my local MB dealer a few months ago for my '92 300TE 4Matic wagon. The replacement of the pads was easy, (need only a wrench for the caliper bolt, slotted screwdriver for the wear sensors, and a C-clamp to compress the caliper pistons), and after the learning curve on the first one, (@ 90 minutes as it was my first time with this car), the second was done is less than 15 minutes. As for the rotors though, I didn't have enough leverage to get the securing bolts off the back of the rotor, (they were REALLY stuck!), so I put that off until a time when I can get the car higher up than on the jack stands I was using. As for the bearings, it is my understanding that they do not have to come off when you redo the rotor, but you may as well since the rotors are off. If you do the rotors yourself, just remember to remove the protective coating from them before you install them.
Also, as with most parts, I would recommend paying the small extra and getting OEM, because you know they will fit. For example, the bolt holding the caliper is a throwaway type; the self locking threads are stripped on removal, so the pads come with new bolts which non MB pads do not. I suppose you could reuse the bolt and apply locktight, but why not just do it right.
If you have a shop replace the brake pads, rotors and wear sensors for all four wheels, I would estimate that it would cost between $650 - $800 U.S., parts and labor. All the more reason to do it yourself!

oasis
 

where are you.i've got a great guy in burlington

Why are you replacing the rotors? They do not need replacing unless they are warped. You do not have to mess with the bearings, simply remove the wheel and you will see an Allen head that comes out to slip the rotor off the hub. You will, of course have to remove the caliper and wire it up to relieve strain on the hose while you change the rotor.

If the rotors are not warped, this will be one of the easiest brake jobs you ever did. You can replace the pads in no time. Make sure you replace one at a time. If you remove both from the same caliper, then start pushing the piston back in place, it could force the opposing piston out too far and necessitate caliper rebuild or replacement.

Good luck,