I just finished up replacing a front rear lower control arm on my rs6 with a MYele HD and noticed that the portion of the control arm that connects to the subframe has 2 small rubber spaces that sit it the space around the center grommet and can slide out. I took them out thinking there were just there for shipping but noticed the control arm I replaced had them still in there. Does anyone know if they are needed as I left them out when I put the control arm back on.