Mercedes 126 repair – forgotten liquids, III. Part

Subject of this article, the brake fluid is not as neglected as the differential gear oil or the power steering fluid. The brakes are finally treated by the most inattentive owner. But we have to pay attention to our braking system before screaming at us.

Mercedes is one of the few car manufacturers who require the service interval for brake fluids – for two years. And there is a very good reason for this. First, the brake fluid is extremely hygroscopic, easily absorbing water vapor from the atmosphere. If you open a brake fluid overnight, you will be endangered the next day. Water in the liquid can boil and vaporize when the brakes are pulled up, preventing the pressure from the blower cylinder to the caliper. The severity of the safety hazard does not need to be indicated. Water also causes corrosion within the braking system. Finally, the fluid in the caliper is decomposed at very high temperatures and time. The liquid looks good in the reservoir, but there is no fluid retraction in this system to be a visual indicator for intervention.

If you live in a humid climate, Mercedes & the medical prescription is not necessarily strong enough. It may be necessary to change fluid annually . And this is the best in the driest part of the year. For most people, work has to be done in the spring months, but in the swampy Central Florida, for instance, the best time for braking is winter, which is the dry season. Regardless of the regular work of the brakes, there are several options for checking the condition of the inserts, rotor and flexible brake lines. Opening and closing the vent screws prevents them from freezing in the rust. And his spike's seal in love.

While some still swear by the traditional two-man braking process, power savers are wonderfully effective and brake bleeding is performed by a simple one-man operation. Power consumption eliminates the need to constantly monitor the fluid level in the tank, thereby reducing the air entering the system and requiring us to restart. They have shown that they reduce the risk of damage to the cylinder during conventional bleeding.

The standard advice starts with the brake cylinder with the furthest brake log. In fact, the right rear caliper is the most difficult to completely bleed. It is imperative that it should remain in place until the fluid leaving the brace is completely clean and bubble free . A small amount of teflon tape that twists around the vent screw threads can provide protection against any tension in the false air. While such air does not remain in the calipers causing operational safety problems, it is difficult to tell whether the brakes have been successfully picked up.

DOT 4 should be used in Mercedes braking systems. If only DOT 3 can be, then this is not the end of the world: in no way damaging the system; simply has a lower boiling point. Whatever you do, do not use DOT 5 Brake Fluid; It is designed exclusively for racing cars and does not belong to road vehicles.

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