Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 155 (BRAKE SYSTEM - GENERAL INFORMATION)GENERAL PROCEDURESBRAKE SYSTEM LEAK CHECK
2010 Mercury Mariner Hybrid, AWD
Brake System Leak Check
2010 Mercury Mariner Hybrid, AWDSECTION Brake System Leak Check
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
- Make sure the brake master cylinder reservoir is full.
- Apply the brakes several times and make sure the brake pedal feel is not spongy. If necessary, bleed the system. For additional information, refer to BRAKE SYSTEM BLEEDING .
- Hold pressure on the brake pedal for 30 seconds.
- Verify that the reservoir level is not dropping.
- If the reservoir level is dropping, inspect the brake components, fittings and lines to locate the source of the leak.
NOTE:
Brake fluid is water soluble and it is possible that all evidence of fluid leakage has been washed off if the vehicle has been operated in the rain or snow.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.