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2012 MERCEDES-BENZ ML
3.5L V6•AWD•AUTOMATIC•gas•M272
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Repairs0Labor492Torque2165Fluid8DTC1852Battery2Maintenance0Recalls0
P1520low severityPowertrain

Cruise Control Switch Circuit Malfunction

on 2012 Mercedes-Benz ML 3.5L V6 · AWD

What this code means

The ECU detected a malfunction in the cruise control switch circuit. The cruise control input signals are not being received or are outside expected values.

Symptoms

  • Cruise control inoperative
  • Check Engine Light
  • Cruise control engages intermittently

Common causes

  • Faulty cruise control stalk switch
  • Wiring damage to steering column switches
  • Clock spring failure
  • Corroded connector
  • ECU input circuit fault

Diagnostic steps

  1. Test cruise control switch signals with scan tool
  2. Inspect steering column connector
  3. Check clock spring operation
  4. Test switch continuity
  5. Inspect wiring to ECU

Repair notes

Replace the cruise control switch or repair clock spring wiring.

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