Since the fluid flush is due anyway, go ahead and completely bleed and flush the brakes. It won't cost but about five bucks for a quart of fluid. Start by emptying the reservoir and filling it with fresh fluid, then use the whole quart and make sure you get all air out.

If the pedal feels mushy while the vehicle is stopped, it's not the pads. Even if it feels mushy when stopping, since the flush is due, just knock it out and then you know for sure the hydraulics are not the problem.

Hope this helps.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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