Locked out at 11pm near Heathrow. They were with me in 25 minutes, no damage, cheaper than the dealer quoted. Genuine lifesavers.
James M.
Hounslow · Emergency Unlock
FBS3 · FBS4 · IR Key · Smart Key ///
Mercedes Key Replacement. From £220.
FBS3 · FBS4 · IR Key · Smart Key — mobile across West London, Slough, Heathrow & Home Counties. Fixed price, fully insured, 12-month warranty. Payment Assist available.
30-min response
West London
Fully insured
Public & PI
Non-destructive
Industry standard
Dealer-level kit
AutoTuner · Autel
Fixed quotes
Before we attend
Instant Tailored Quote
Get An Instant Auto Locksmith Quote
Enter your reg & postcode. Tick any extras — we'll send a tailored quote via WhatsApp in minutes.
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Fixed price confirmed before we attend · No-damage entry · Dealer-grade key programming
No spam · No obligation · Fixed pricing confirmed before we attend
Professional. Mobile. Trusted.
Mercedes-Benz keys split into two generations: older FBS3 IR keys (W203 C-class, W211 E-class, W164 ML, Vito, Sprinter pre-2018) and the newer FBS4 smart keys (W205 C-class onwards, W213 E-class, X253 GLC, current Sprinter). FBS4 is one of the most secure key systems on the road — dealer pricing routinely exceeds £600 — but a properly equipped mobile specialist can still program a replacement on site. StageMyCar is Mercedes key replacement specialist across West London for every model and every generation, including AMG, EQ EV and commercial Vito / Sprinter.
- FBS3 IR keys — W211 / W164 / W203 / Vito
- FBS4 smart keys — W205 / W213 / X253 / X167
- Sprinter & Vito commercial keys
- EQ / EQA / EQB / EQC EV keys
- AMG model keys
- All-keys-lost recovery (FBS3 same day, FBS4 same week)
- Spare key on site in 60 minutes
- Mobile to driveway, workplace, hotel
- From £220 — typically 50-60% less than main dealer
Payment Assist · Official Partner
Spread the Cost with Payment Assist
On selected services over £250, you can split the total into 3 or 4 monthly payments with 0% APR available. A small deposit is paid on the day, then the remaining balance is collected in equal monthly instalments. No long forms, no waiting — applied on site before work begins.
- 0% APR available on selected services
- 3 or 4 equal monthly payments
- Deposit paid on the day
- Soft credit check — no impact at quote stage
- Decision in minutes, on site
- Available on jobs over £250
Finance subject to status and approval and provided by Payment Assist Ltd, authorised and regulated by the Financial Conduct Authority. 0% APR available on selected services. Terms, eligibility and final monthly figure confirmed at application. StageMyCar UK is an introducer appointed representative — we do not charge a fee for this service.
Example · Illustrative
£480 ECU Remap · 0% APR
3 payments
£120/mo
£120 deposit
4 payments
£96/mo
£96 deposit
Authorised & regulated by the FCA
Decision in minutes — apply on site
Subject to status & approval
Indicative example only. Final terms confirmed at application.
Frequently Asked Questions
How much is a mercedes key replacement?+
Our mercedes key replacement service starts from £220. Final price depends on exact model, year and key type — fixed price always quoted before work begins. Typically 40-60% less than main dealer.
Do you come to me?+
Yes — fully mobile across West London, Slough, Heathrow, Uxbridge, Hayes, Hounslow, Wembley, Richmond and surrounding areas. Driveway, workplace, hotel — we attend.
How long does it take?+
Most mercedes key replacement jobs are completed on site in 60-120 minutes. Some newer security-gated models may need a second visit — we'll tell you up front before booking.
Will it affect my car's warranty?+
No — programming a key or remapping an ECU does not invalidate manufacturer warranty for unrelated components. We can also revert any ECU work back to factory free of charge before any dealer visit.
Is the work guaranteed?+
Yes — 12-month parts and labour warranty. Fully insured, fully insured, dealer-grade equipment. 36 verified 5-star Google reviews.
Can I pay in instalments?+
Yes — Payment Assist available on jobs over £250: 3 or 4 monthly instalments, 0% APR on selected services. Subject to status.
★ 5.0 / 5 · 36 Google reviews
Trusted by drivers across West London
StageMyCar UK is a mobile auto locksmith and ECU specialist serving West London, the M4 corridor, Heathrow, Slough, Reading and surrounding areas. Fixed-price quotes, DBS-checked engineers, fully insured, 7 days a week. Call 07312 826380 for an instant quote.