Mercedes S-Class 4th (W220) (1999–2005) — Key Programming Reference
- Difficulty
- hard
- Lishi / lockout
- HU64
Key fobs & transponder keys (2 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · IYZ3312 | 2000–2005 NA (IYZ3312 Marquardt grant 2000-04-26) | IYZ3312 | 5WK47283 | Mercedes FBS3 NEC/BGA (IR-read at EIS) | 315 MHz | CR2025 | HU64 |
| 433.92 MHz · A2207661306 | 1999–2005 Europe / GCC / RoW (no Panic button) | n/a | 2207661306 | Mercedes FBS3 infrared (IR) crypto key — no conventional RF transponder | 433.92 MHz | CR2025 | HU64 |
Programming procedures
What the job needs
- Add a key: 1 existing working key required.
- All keys lost: no existing working key needed.
- PIN / security code: No PIN — IR + tokens.
- Online / server access: required — Cloud token req'd.
- On-board (no tool) sequence: not available — 1999-2005 W220 has no DIY onboard programming. Mercedes XENTRY / DAS dealer relearn requires SCN coding certificate (still available for classic chassis at MB classic-car service centers). Aftermarket Add Key requires VVDI MB Tool + W220 IR adapter + tokens OR Abrites AVDI Mercedes (EU-preferred for pre-2003).
- On site: engine off · 12V+ + charger · Clear EIS + DAS DTCs.
- Bring: Photo ID + vehicle registration. Title strongly recommended for AKL on classic-era Mercedes (W220 is 25+ years old — title chain verification critical).
Tool coverage
Documented for this case on: Autel IM608 Pro II · Autel IM508S · Autel KM100 · Xhorse Key Tool Plus · Xhorse Key Tool Max Pro · Lonsdor K518 Pro / K519 · OBDSTAR X300 DP Plus · AutoProPad G2/G3 · Advanced Diagnostics Smart Pro · Launch X431 IMMO Elite / IMMO Plus. Step-by-step menu paths for each tool are in the app.
Notes & cautions
- This chassis (W220 S-Class, 1999-2005) is Mercedes FBS2 NEC-IR EIS era — the FBS2 flagship sedan — predecessor to W221 FBS3. FBS2 era uses IR (infrared) read of EIS password via dashboard IR port, not OBD-only like FBS3. Two W220 sub-eras: 1999-2002 early (first-gen NEC IR), 2003-2005 facelift (refined IR + added security counters). IR read success is good on W220 (~85%, similar to W203). Verify trim + production date — wrong FCC key will not pair.
- FBS2 IR EIS on this variant (W220 S-Class) requires Xhorse VVDI MB Tool + W220 IR adapter cable (W220-specific SKU). Flagship-tier SCN coding post-AKL for S55/S65 AMG variants — budget XENTRY follow-up OR Abrites AVDI Mercedes (EU-locksmith standard for pre-2003 Mercedes — best IR success rate). Autel IM608 + IMKPA covers W220 FBS2 but IR read is the bottleneck — IM608 password calc itself works once IR data is read. CGDI MB has FBS2 coverage from 2004+ NEC variants (W203 era and later), not pure FBS2 W220.
- W220 AKL is OBD-or-IR — bench EIS removal needed if IR port damaged. IR read success on W220 is generally good (better than W210/W215 where IR read fails ~30% of attempts per locksmith reports). Verify IR port functional before quoting OBD/IR vs bench pricing. AMG S55 / S65 W220 variants share standard EIS architecture but get flagship-tier SCN coding post-AKL — no AMG-specific quirk on FBS2 era.
- AKL on this chassis erases all previously paired FBS2 IR keys. Bring minimum 2 new Mercedes FBS2 NEC IR keys matching trim. Wrong chip family (e.g., FBS3 NEC EIS keys from W203/W204 era) will not work — verify chip generation before ordering.
- W220 AKL is OBD-or-IR friendly when IR port is intact (~85% IR read success). Damaged IR port = bench EIS EEPROM read via Autel XP400 PRO or Xhorse VVDI Prog. Bench job adds ~1 hour vs IR. Verify IR port functional before quoting bench-vs-IR pricing.
- AKL erases EIS-paired remotes. Recovered old keys will not authenticate — customer must be informed. Verify trim before scheduling: S320 / S430 / S500 / S600 / S55 AMG / S65 AMG / Maybach 57/62 (early models on W220 platform) all share W220 EIS architecture. Classic-era W220 (1999-2005) — title chain verification critical given vehicle age.
Lockout
Door pick / decode: Lishi HU64 (CCW).
24 verified sources · Last verified: 2026-08-10
Open full case in KeyAssist →Step-by-step tool menu paths, verified source links and video guides for this case are in the KeyAssist app — free to start, works offline.