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Mercedes-Benz • FBS4
Mercedes FBS4 EIS Key Programming (W204 / W205 / W213 / W222 / W447 / VS30)
FBS4 Mercedes keys: add key from the EIS and a working key, all keys lost with EIS plus ECU. Postal service UK-wide or mobile across the West Midlands.
Supported models — FBS4
- W204 C-Class (late)
- W205 C-Class
- W213 E-Class
- W222 S-Class
- W253 GLC
- W156 / W176 A & GLA
- W166 GLE
- W447 Vito
- VS30 Sprinter
Supported EIS / ignition modules
- FBS4 EIS / EZS ignition-switch families (encrypted key data)
- Paired engine ECU / CDI control units required for all-keys-lost
- Keyless-go smart key and bladed key variants
- Electronic steering-lock modules on applicable models
Add-key requirements
- EIS plus one existing working key
- Blade cutting optional where the key has a mechanical blade
- Keyless-go function retained
All-keys-lost requirements
- EIS and the matching engine ECU — both required on FBS4
- Ownership proof (V5C + photo ID)
- Both parts must come from the same vehicle
ECU required. On FBS4 (W205+, W213+, W222+, W447, VS30) the EIS and engine ECU are cryptographically paired, so all-keys-lost work needs both modules.
Mercedes key programming prices
| Service | Price | What's needed |
|---|---|---|
| Add Key (postal, including blade cutting) | £180 | EIS + one working key required |
| Add Key (postal, no blade cutting) | £165 | Key shell / blade supplied by you |
| Second key (same visit or same postal job) | £90 | 50% discount on the add-key price |
| All Keys Lost — 1 key | £200 | EIS required; ECU also required on FBS4 |
| All Keys Lost — 2 keys | £300 | Both keys coded and tested together |
| Mobile service (West Midlands) | Location-dependent | Quoted on postcode before booking |
| ESL / steering-lock emulator — inline add-on | £100 | Added to an existing key job |
| ESL / steering-lock emulator — standalone | £180 | Part + labour + coding |
Prices are guide prices including coding and testing. Mobile visits are quoted on your postcode. Postal jobs are turned around the day the parts land wherever possible.
Wolverhampton base • West Midlands mobile • UK-wide postal
We are based in Wolverhampton and travel to Birmingham, Walsall, Dudley, West Bromwich, Cannock, Telford for mobile Mercedes key work. Anywhere else in the UK, post the modules in and we return them programmed and tested.
MCCoding — technical reference
Immobiliser signal chain
- Sheet
- MCC-KEY-01
- Scale
- NTS
A key is only a key when every module in this chain agrees. That is what programming actually does.
Key fob & transponder: Remote buttons plus a chip that answers the car's challenge — the part that has to be married to the vehicle.
Blank keys are not keys
A cut blade opens doors. Starting the engine needs the transponder written into the car's key list.
All keys lost is a data job
With no working key we read the immobiliser data out, calculate the key, then write a fresh one in.
Spares are cheaper before the panic
Adding a spare while one key still works is a short job. Losing the last key is a much bigger one.
Coding keeps the car standard
Keys, comfort access and remote functions are coded to your build, not bodged with generic settings.
Overview
FBS4 (from roughly 2009 on the W204 and standard from the W205 onwards) links the ignition switch and engine ECU cryptographically. Adding a key needs the EIS and one working key. All-keys-lost needs the EIS and the engine ECU together so the pair can be re-synchronised — we tell you exactly which parts to remove or bring before you book.
What's included
- FBS4 EIS key programming
- Add-key service (EIS + working key)
- All keys lost — EIS + engine ECU
- EIS / ECU re-synchronisation
- Keyless-go smart key coding
- ESL emulator where fitted
- Postal UK-wide
- Mobile across the West Midlands
Step-by-step
- Step 1Confirm FBS4 and parts needed
Registration checked; we confirm whether the ECU is required for your job.
- Step 2Send EIS (+ ECU) or book mobile
Postal UK-wide, or mobile across Wolverhampton and the West Midlands.
- Step 3Programme & re-sync
Keys written and the EIS / ECU pair re-synchronised so the car starts first time.
- Step 4Test & return
Start, keyless-go and remote functions tested before return post or handover.
Supported vehicle brands
- W204 C-Class (late)
- W205 C-Class
- W213 E-Class
- W222 S-Class
- W253 GLC
- W156 / W176 A & GLA
- W166 GLE
- W447 Vito
- VS30 Sprinter
Common faults we resolve
- All keys lost on a modern Mercedes
- Only one key left, no spare
- Replacement EIS or ECU needs pairing
- Keyless-go not recognising the key
- Immobiliser prevents start
Benefits
- Correct FBS4 EIS + ECU procedure
- Keyless-go functions preserved
- Clear list of parts before you book
- Fixed guide prices
- Postal UK-wide, mobile West Midlands
Pricing
Add key from £165 postal (£180 including blade cutting), second key £90, all keys lost from £200 (£300 for two). ESL emulator £100 add-on or £180 standalone. Mobile visits quoted on postcode.
Service area
Based in Wolverhampton. Mobile across the West Midlands. Modules and ECUs accepted by post UK-wide.
- Wolverhampton
- West Midlands
- Birmingham
- Walsall
- Dudley
- West Bromwich
- Cannock
- Telford
Why choose ManCarCoding
- Automotive electronics specialists — not a general garage
- Wolverhampton base, mobile across the West Midlands
- Dealer-level tooling, bench and boot-mode capability
- Backups taken before any read or write
- Written report on every diagnostic session
- Trade rates for garages and body shops
Frequently asked questions
Why does FBS4 all-keys-lost need the engine ECU?
On FBS4 the EIS and engine ECU are cryptographically paired. To create a key with no working key present, both modules have to be read and re-synchronised together.
Do I need the ECU just to add a spare key?
No. Adding a key needs the EIS and one existing working key only.
Which models are FBS4?
Late W204, W205, W213, W222, W253 GLC, W166 GLE, A/GLA, plus W447 Vito and VS30 Sprinter.
Will keyless-go still work?
Yes. Smart keys are programmed with keyless-go and comfort functions intact.
Wolverhampton & West Midlands
Do you cover mercedes fbs4 key programming in Wolverhampton?
Yes. Wolverhampton is our base. Mercedes FBS4 key programming is carried out mobile at your address or at the workshop, usually same or next day.
Which areas outside Wolverhampton do you travel to?
Mobile cover across the West Midlands — Birmingham, Walsall, Dudley, West Bromwich, Cannock and Telford. Modules and ECUs are also accepted by post UK-wide.
Are you an automotive electronics specialist or a general garage?
Automotive electronics only — keys, immobilisers, ECU cloning, coding and diagnostics. No bodywork, no guesswork.