Okay, try the next step of removing power all together by either removing the fuse or removing the negative lead on the battery wait 20 seconds then reconnect I’m 99% sure this will fix the issue.I think my E class , was all discs and pads £180 via ECP sales and £320 all in for MB , that allowed me to refurb all my calipers as well for under £250 ish by taking the Brembo option