Foot pads.  

NOTE: If you need to order the hardware, then you need to order two of 5020007, four of 6057211 and six of 17000723

NOTE: The original style food pads for the 300EL (with 2 screws holding each foot pad in) are no longer available, but the pedal arms and foot pads from the 360EL will fit. IF YOU ORDER THESE FOOT PADS FOR A 300EL, YOU NEED TO ORDER 16000736