Porterfield Brake Pads for 2017 MERCEDES-BENZ E400 Coupe Location:Rear or do I need to

or do I need to enable it

Headlight Operating Voltage 12V

Black housing finish - Integrated contrast that reads aggressive without aftermarket overstatement

or do they need prep before welding

Porterfield Brake Pads for 2017 MERCEDES-BENZ E400 Coupe Location:Rear or do I need toPorterfield Brake Pads for 2017 MERCEDES BENZ E400 Coupe Porterfield R4 Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon Kevlar material also allows