2026-07-22 · 5 min read
Mercedes CLS Alternator Malaysia — C218/C257
C218 M276 uses conventional smart alternator. C257 M256 uses 48V ISG (EQ Boost) as main generator — conventional belt alternator for 12V charging. ISG fault diagnosis requires XENTRY and specialist. Malaysia C218 alternator RM 1,000–2,000.

CLS Alternator — C218 vs C257
- C218 M276: conventional smart alternator — voltage regulation failure most common
- C257 M256: 48V ISG (EQ Boost) is main generator + conventional belt alternator for 12V — ISG fault needs XENTRY specialist
- C218 alternator Malaysia: RM 1,000–2,000
