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2012 MERCEDES-BENZ C350 W204
3.5L V6 M272•RWD•AUTOMATIC•gas•turbo
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Repairs0Labor495Torque4253Fluid7DTC1098Battery1Maintenance0Recalls0
C0023moderate severityChassis

LR Wheel Speed Sensor Range/Performance

on 2012 Mercedes-Benz C350 W204 3.5L V6 M272 · RWD

What this code means

The left rear wheel speed sensor output is outside expected parameters for current vehicle speed.

Symptoms

  • ABS light on
  • Rear ABS only partially functional
  • Stability control warning

Common causes

  • Sensor contaminated with debris
  • Tone ring runout
  • Damaged sensor tip
  • Axle bearing wear

Diagnostic steps

  1. Compare rear sensor speeds at steady cruise
  2. Inspect sensor for metallic debris buildup
  3. Measure tone ring runout with dial indicator
  4. Check axle bearing
  5. Test sensor output voltage

Repair notes

Clean sensor and tone ring. Replace sensor if output is weak.

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