Home >> Volvo >> 2007 >> S60 Base, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic-Vacuum-Hydraulic Brakes - Removal, Replacement And Installation >> Brake Pipe And Connections (B5254T4; 2004-2007) >> Brake pipe master cylinder / ABS unit, replacing >> Preparation >> Disconnect the battery lead