The braking system is a complex series of parts all at work under the hood of your Mercedes-Benz that help you bring your vehicle to a stop. The braking system is something that works effectively thanks to all these different components functioning as they should, including your master cylinder. The master cylinder converts mechanical pressure into hydraulic pressure required by your brake calipers. It helps force brake fluid into the brake circuit. The master cylinder is a part that can start to wear out over time thanks to the high amount of heat and pressure generated during the braking process. If you notice that your brake pedal feels spongy or is slowly sinking to the floor when you step on it, this can be a sign of damage to the master cylinder. Another thing you might notice is a low amount of brake fluid, which could indicate a leak somewhere in the system. If you need a new OEM Mercedes-Benz master cylinder or related parts, find them here on our site.