Procedure During Intermediate Maintenance
Visually inspect the brake pads for wear. There is no need to remove the wheels unless the brake fluid needs to be changed at the same time.
Outside of brake pad: Visual inspection through the cut-outs in the rim.
Inside of brake pad: Visual inspection from below with vehicle raised.
Without an aid, the inner brake pad is not or is only partly visible on the rear axle (with the wheel fitted).
A mirror can be used as an aid -arrow- .