I have a 2010 c300 4Matic with the dash throwing ABS/Traction control/Cruise control inoperative. Scan showed a bad wheel speed sensor. I went ahead and replaced all 4 wheel speed sensors to resolve this issue and now I'm throwing errors on both front wheels:

5114: Right front axle rpm signal is implausible
7271: Implausible values of rpm sensors (front axle)
5100: Left front axle rpm sensor has an electrical fault
5110: Right front axle rpm sensor has an electrical fault

Of note I wasn't able use bosch all around. Front wheel sensors are a different brand. Did I manage to buy two lemon sensors?