How long after brake wear indicator comes on do you need to change the brakes on a 2007 ml350 4matic

ok your beemer doest need brake fluid added unless there is a leak in the system. you have brake pad wear indicators that light up dash light when brakes get low. the fluid in system goes down as pads wear fluid does not need added to system. at a glance at master cylinder i can tell if pads need looked at. the master cylinder is under engine cover at fire wall drivers side remove and look but dont add unless a leak is present and then have repaired.

Disc brakes usually include a part called a wear indicator. A wear indicator is a small piece of metal attached to the brake pad that contacts the brake rotor when the pad material has been worn down to a certain level. When the wear indicator grinds against the rotor, it makes a squealing noise as you apply the brakes. This noise is a signal which tells you it's time to have your brakes examined.
In other words, noisy brakes aren't something to mess around with. If you hear that sound when you apply the brakes in your vehicle, have them checked out as soon as possible.
I hope this helps.

brake wear depends on driveing condition amount of times you stop and go if you drive alot of in town driveing verses interstate driveing type of brake pads you have on it also depends dealer prices are always more expensive theres many brake shops that guarantee there work for half the price of dealers happy holidays hope this helps

Sounds like the brake pad wear indicator light on your vehicle. Time to replace your brake pads.

One of your brake wear indicator sensors is probably faulty. With a scan tool you should be able to determine which sensor is faulty and deal with it accordingly.

The 2007 Honda Accord is equipped with four wheel disk brakes. Disk brakes wear down and require regular maintenance. Worn brake pads can cause squeeling and grinding noises, as well as reduced braking power. Improperly maintained brake pads can cause damage to the brake rotors as well as brake failure. Save on labor costs by replacing your own brake pads.www.lightdeal.co.uk

There is no set mileage, many factors come into play. Weight of car, driving habits, where you are driving (highway/city) all determine how long they will last.
However, one rule generally applies: You will go through two sets of front brake pads for every one set of rear pads. This is because the majority of a cars braking happens in the front. Most pads have wear indicators, softer metal that makes contact, and sound, when the pads are getting low. Keep your ear out for this strange grinding sound. It's time to replace the pads! Hope this helps.

This sounds like a wear indicator( a metal tab on the brake pad) is doing its job, warning you that the brake pads need replacement soon. you can bend the wear indicators away from the rotor so they won't make contact. This will stop the annoying noise. Replace the pads and check the brakes soon. Brake pads should always be changed on both wheels at thge same time, so change the other front pads also.

some vehicles have a sensor that attaches to the brake pads and when they wear to the point that the sensor touches the rotor, it'll wear the plastic off the sensor and touch the metal inside to trigger a replace brakes light on your dash. im not familiar with the prius's system, but if you had a wire going to your brake pads, you'll need to replace it. once the sensor is triggered, it's no good anymore.

Most of the stopping power goes to the front of the car. You usually go thru two sets or sometimes three sets of front pads before you need to change the rear brakes. It sounds odd the rear brakes need to be replaced at 22,000. havee the front brakes been replaced before?