P0615moderate severityPowertrain
Starter Motor Relay Circuit
on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD
What this code means
Malfunction in the starter motor relay circuit.
Symptoms
- No start - no crank
- Starter relay clicking
- Intermittent no-start
Common causes
- Faulty starter relay
- Wiring issue
- Ignition switch problem
- Neutral safety switch issue
- PCM starter control failure
Diagnostic steps
- Test starter relay
- Check wiring to relay
- Test ignition switch
- Test neutral safety switch
- Check PCM starter output
Repair notes
Replace starter relay. Check ignition switch and neutral safety switch.
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