Brake pads may contain asbestos which has been known to cause cancer. It's a very good idea to wear a mask or respirator. While changing your brake pads may not create enough asbestos dust to lodge into your lungs and bring about cancer, it is better safe than sorry. The brake system is made up of a caliper which holds the brake pads. The brake pads press against the brake rotors and slow the rotation of the wheels. The master cylinder pumps brake fluid to actuate the pads applying pressure to the rotors. Over time the brake pads wear down. There are sensors which send a signal indicating wear to the point of replacement. Replacing the brake pads is straight forward.
There are a few ways one can replace the front brake pads. This is a quick method that replaces the pads only without having to take off the calipers. Depending upon the model, you may have one of three types of calipers; Teves (ATE), Bendix (BX) or Girling (found typically on the rear axle).
The wheel must be taken off prior to replacing the brake pads. You'll need to jack up your car and put jack stands under it. Please refer to our article on safely jacking up your 450SL.
Turn the wheel out so that the brake calipers are easy to get to. If you are changing the passenger's side front wheel brake pad, turn the wheel to the right. This will provide greater access to the pads.