2026-07-22 · 5 min read
Mercedes GLC Alternator Problems Malaysia — X253
GLC X253 M274/M264 alternator: smart alternator common faults include voltage regulation failure. XENTRY for live voltage diagnosis. Malaysia replacement RM 900–1,800.
GLC Alternator — Smart Charging System
GLC X253 M274/M264 uses a smart alternator. Voltage regulation failure is the most common fault — the alternator charges at an inconsistent voltage, draining the battery slowly over weeks. A workshop voltage load test under various conditions (idle, rev to 2,000 rpm, AC on) can confirm the fault before replacement.
Cost
- Alternator + labour + IBS coding: RM 1,000–1,900