2026-07-22 · 5 min read
Mercedes CLS Battery Replacement Malaysia — AGM + IBS
CLS battery is located in the boot on C218 and C257. AGM battery only — IBS sensor coding via XENTRY mandatory. C257 with EQ Boost has additional 48V lithium battery separate from the 12V AGM. Malaysia 12V AGM cost RM 700–1,100.

CLS Battery — Boot-Mounted AGM + IBS
- Battery in boot on both C218 and C257 — AGM only
- IBS coding via XENTRY mandatory — Malaysia 12V AGM cost RM 700–1,100
- C257 EQ Boost: also has separate 48V lithium battery — diagnosis is different system
