Mercedes-Benz GL450 brake fluid reservoir sensor malfunction causing low fluid warning on Mercedes-Benz GL450

Submitted by Milehighatlanta · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz GL450 owners report experiencing issues with the brake fluid reservoir sensor, which can trigger a warning light indicating low brake fluid levels. This warning light is significant as it may point to potential problems such as leaks in the brake system that require immediate attention. Owners emphasize the importance of addressing this warning promptly to ensure the proper functioning of the braking system and overall safety while driving. Additionally, some owners find that the malfunctioning sensor needs replacement to rectify the issue and prevent further complications with the brake fluid level warning system. If the sensor replacement is covered under warranty, it can help reduce repair costs. Ignoring the warning signs related to low brake fluid levels can lead to impaired braking performance and increased safety risks on the road.

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Mercedes-Benz GL450 vehicles with this problem

Average mileage: 34,950 miles
(34,950 - 34,950)

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