Mercedes-Benz SLK350 Brake rotors are turning blue Inspection at your home or office.

Common reasons for this to happen:

• Locked Caliper: One very common reason for rotors to turn blue is that the caliper is locked and the brake pads remain in almost constant contact with the metal. This might be slight enough that you don’t notice any drag during normal operation, but it will be enough to generate significant heat and wear.

• Corroded Slide Pins: Your car’s calipers slide back and forth on metal pins. These pins need to be well lubricated, clean and free of debris. If they become corroded, the caliper will not slide in and out properly and can remain too close to the rotor rather than moving back to the start position.

• Pinched/Deteriorating Brake Line: Your brakes work on hydraulic pressure. If there’s damage to one of the brake lines (a kink, or internal damage to the liner that limits the amount of fluid flowing in and out), it can cause your caliper to stay at least slightly engaged at all times. This generates heat and blues your rotor.

• Driver Error: If you’re a “two-footed” driver or regularly ride your brakes because you do a lot of stop and go driving or live in an area with lots of hills, you could be the inadvertent cause of the problem. Constantly engaging your brakes causes the same buildup of heat as having a locked caliper, but you’ll notice bluing on two or four rotors, rather than just one.