MERCEDES Key Replacement Service
Professional Mercedes-Benz key and Keyless-Go replacement service across the UK. Lost your Mercedes SmartKey? Need Keyless-Go Starter programming? Our Mercedes specialists provide same-day mobile service with dealer-level equipment and guaranteed expertise.
Same-day service available • Mobile technicians • 59% cheaper than dealers
(Standard calling rates apply – UK Wide Coverage)
10+ Years
MERCEDES specialist technicians
5★ Rated
1000+ MERCEDES owners served
Same Day
Most jobs completed today
59% Less
vs. MERCEDES dealership
Mercedes key replacement doesn’t have to be complicated or extortionately expensive. We specialise in helping Mercedes-Benz owners who’ve lost keys, broken fobs, or simply need a spare – and we do it properly, with the right equipment and expertise.
Your Mercedes has Electronic Ignition Switch (EIS) and Electronic Steering Lock (ESL) systems that are frankly quite delicate. They need specialist knowledge, not a Facebook locksmith with an Autel tablet who treats every car the same. We’ve repaired hundreds of Mercedes vehicles that were damaged by amateur programming attempts, so we know exactly what can go wrong.
Our mobile technicians cover South Wales, Bristol, Bath, and the surrounding areas. We arrive fully equipped with Mercedes-specific diagnostic tools – not generic software that might or might not work. Most jobs are completed in under an hour at your location, whether that’s home, work, or roadside.
Main dealers charge premium prices because they can. You’ll typically pay £400-600 and wait days for an appointment. We deliver the same quality work at genuinely affordable rates, programming your keys through the OBD port using proper manufacturer protocols. No module removal, no risky soldering, no shortcuts.
From W204 C-Class to the latest W206, from GLA to AMG variants, we handle the complete range professionally. That’s proper Mercedes key replacement, done right.
Why Choose KeyCardServices for Your MERCEDES Keys
⚙️ MERCEDES System Specialists
Our technicians are extensively trained in MERCEDES’s specific security systems including Luxury specialists. We use manufacturer-grade diagnostic equipment and follow MERCEDES’s programming protocols precisely. This expertise ensures reliable key programming that dealerships can’t match for efficiency.
🔧 Same-Day MERCEDES Service
MERCEDES owners expect quality service without delays. We typically arrive within 30-60 minutes of your call, fully equipped to handle any MERCEDES key situation. Most jobs completed in under 60 minutes on-site. No waiting days for dealership appointments.
🔑 Transparent Pricing
No hidden fees or surprise charges. While MERCEDES dealerships add VAT, diagnostic fees, and coding charges, we provide clear fixed pricing upfront. Save an average of 59% compared to dealer rates. What we quote is what you pay.
🌐 All MERCEDES Generations
From older MERCEDES models to the latest releases, we have the expertise and equipment for all generations. Our technicians stay updated on the newest MERCEDES security systems and maintain compatibility with legacy models. Full 24 months warranty on all work.
Our MERCEDES Key Services
MERCEDES Key Replacement
Lost your MERCEDES key? We cut and program genuine replacement keys for all MERCEDES models. Full immobiliser programming included with same-day mobile service.
Spare Keys
Bought your MERCEDES with only one key? Get a spare programmed today and avoid the stress of losing your only key. Competitive pricing and fast turnaround.
Key Fob Repair
MERCEDES remote not working? We repair and reprogram key fobs that won’t respond or start your car. Battery replacement, button repairs, and circuit fixes.
Emergency Lockout
Locked out of your MERCEDES? Our emergency locksmith service gets you back in your vehicle quickly and safely with non-destructive entry methods.
Key Programming
Expert MERCEDES immobiliser programming. We ensure your new key works perfectly with your vehicle’s security system using dealer-level diagnostic equipment.
Lost All Keys
Lost every key to your MERCEDES? No problem. We can create new keys from scratch using your VIN and vehicle security codes, with full immobiliser reset.
Why Not Use Your MERCEDES Dealership?
| Service | KeyCardServices | MERCEDES Dealer | You Save |
|---|---|---|---|
| Key | From £145 | From £300 | Competitive |
| Waiting Time | Same day | 5-7 days | 1 week saved |
| Coding Work | £75 | £150/hour | £75 saved |
| Location | We come to you | Dealership only | Time & travel saved |
| VAT | NO VAT | +20% VAT | £245 saved |
| Warranty | 24 months ⭐⭐ | 12 months | 2x longer! 🎉 |
| TOTAL (Complete Service) | £220 | £540 | £320 (59%) |
💰 Real Savings Breakdown
Our complete MERCEDES key service costs £220 (key £145 + programming £75, NO VAT).
MERCEDES dealerships charge £540 for the same service (key £300 + programming £150 + 20% VAT £245).
You save £320 (59%) by choosing KeyCardServices—while getting the same professional quality,
same-day mobile convenience, and a comprehensive warranty. Plus, we include a 24-month warranty
(double the dealer’s 12-month coverage) at no extra cost! That’s 2 full years of complete peace of mind vs the dealer’s standard 1 year—included in our £220 price.
MERCEDES Models We Service
Our MERCEDES Key Services & Pricing
| Service | Price | What’s Included |
|---|---|---|
| Spare Key | From £145 | Complete key + programming, same-day service |
| Lost All Keys | From £155 | New key + immobilizer reset + programming |
| Key Repair | From £45 | Fix buttons, housing, battery replacement |
| Emergency Lockout | From £85 | Non-destructive entry + new key if needed |
| Programming Only | From £75 | Sync existing key to vehicle system |
⚠️ Please note: Prices shown are indicative starting prices based on standard key types. The exact price depends on your specific key type, vehicle model, and year. For an accurate quote tailored to your vehicle, please contact us directly. Prices displayed on this page do not constitute a commercial offer.
How Our MERCEDES Key Service Works
Get In Touch
Call or message with your MERCEDES registration. Instant quote, no obligation.
We Come to You
Our technician arrives fully equipped at your location—we call 1 hour before.
Get Your Keys
Keys cut, programmed, and tested on-site. Usually done in under 60 minutes.
Peace of Mind
12-month warranty included. Everything checked and working perfectly.
MERCEDES Key Replacement FAQs
My MERCEDES C-Class immobilizer keeps acting up. Is it serious?
Usually transponder battery fading or system needing recalibration. We diagnose with MERCEDES-grade equipment.
My MERCEDES key fits but won’t start car. What’s wrong?
Likely EIS/ESL system not recognizing transponder. We diagnose and reprogram.
How long does the MERCEDES key programming take?
Typically 45-60 minutes including cutting and programming. We do everything on-site at your location.
What payment methods do you offer for MERCEDES key work?
Cash, card, bank transfer. Card payment on-site via portable terminal.
Do you need both MERCEDES keys to program third?
Not necessarily. We can program new keys with just one existing working key.
My MERCEDES key fob has water damage. Can it be saved?
Sometimes. We dry, clean, test. If circuit damaged, we replace with new programmed fob.
Do you test MERCEDES key before leaving?
Yes, full testing—engine start, locking, unlocking. Everything works before we leave.
Can you reprogram MERCEDES key after battery change?
Yes, sometimes battery change causes desync. We reprogram to restore function.
What Our Customers Say
“Key replacement for two Mercedes cars. Very easy to set up an appointment. Superbly punctual as arranged. Whole job was completed ahead of time. Before they left, they made sure I was happy with the service, and that the keys exactly matched the requirements. Extremely helpful and pleasant correspondence, and in situ. Could hardly be better.”
— Sarah M., Newport
MERCEDES GLC
“I’ve just had a spare key sorted for my daughter’s car as there was only one when she brought it,key card services were absolutely brilliant they come to my house phoned 1hour before arriving as promised and arrived spot on time sorted it very professionally would use them again
Many Thanks”
— Anna P., Chepstow
MERCEDES E-Class
“They were quick, efficient and offered me the best rate in the market.“
— Ryan B., Merthyr Tydfil
MERCEDES S-Class
“Brilliant service, with good communication prior to my home visit. Can’t fault the service. Will definitely recommend to others.”
— Olivia H., Abertillery
MERCEDES S-Class
⏰ Why Wait for MERCEDES Dealership Service?
❌ MERCEDES Dealership: Wait 5-7 days, Pay £540+, Dealership location only, 20% VAT added
✅ KeyCardServices: Same day, From £220, Mobile service to you, NO VAT added
Don’t delay—book your MERCEDES key replacement today and save time, money, and hassle!
✓ Professional Standards & Trust
Every technician is certified and vetted:
MERCEDES Specialists – Professional qualifications in MERCEDES systems and programming
DBS Checked – Enhanced background checks for your peace of mind
Fully Insured – Comprehensive insurance covering all work and your MERCEDES
10+ Years Experience – Trusted service with thousands of happy MERCEDES owners
Ownership Verification – We verify V5 registration and photo ID before service begins
24-Month Warranty – Guarantee on all keys, fobs, and programming work
Areas We Serve
Our mobile MERCEDES key replacement service is available across major UK cities. We bring professional service directly to your location—whether at home, work, or roadside.
Areas covered: Cardiff, Swansea, Newport, Bristol, Bath, Exeter, Gloucester, Southampton, Bournemouth, Oxford
Don’t see your area? Call us—we may still be able to help with your MERCEDES key replacement needs.
⚠️ Mercedes EIS System Vulnerability
Universal diagnostic tablets cause catastrophic damage to Mercedes EIS systems. The £120-150 Facebook offers don’t mention this.Mercedes EIS Corruption Rate: 50% with universal programming tools
Your Mercedes Electronic Ignition Switch requires manufacturer-specific protocols that generic tablets don’t properly understand. Tools like Autel, Obdstar, XTool and Lansdon are built to service every vehicle brand, which inevitably means they lack the depth needed for complex Mercedes security systems.
Why “One Tool Fits All” Fails: Universal tablets are marketed as working on “all vehicle makes and models.” This broad compatibility is achieved by using standardised programming sequences. Mercedes, BMW, Audi and similar manufacturers require precise, brand-specific protocols. Generic approaches have 50% failure rates because they’re fundamentally incompatible with sophisticated security systems.
The Standard Pattern:
• Amateur arrives with universal diagnostic tablet
• Programming attempt fails, EIS corrupts
• They promise to return with “updated software”
• They vanish, your Mercedes won’t start
• You pay dealer £3,000+ for new modules
Main dealer EIS replacement: £1,200-2,800
18-Month Statistics:
• 17+ vehicles repaired after generic tablet attempts
• Average customer loss: £1,800
Zero Risk To You – We Take Full Responsibility
Ready to Fix Your MERCEDES Keys?
Same-day service • Specialists • 59% cheaper than dealers • UK wide coverage
Fast • Trusted • Affordable • Call Now
KeyCardServices – Your Professional MERCEDES Key Partner
Expert MERCEDES key replacement and programming services across the UK
Trusted since 2016 • 5★ rated by MERCEDES owners • Same-day service • Specialists • DBS checked • 24-month warranty