YOUR CAR
CAN BE STOLEN
in under 60 seconds with no alarm triggered
Mercedes immobiliser: protect your Keyless-Go car
LockCAR makes immobilisers in Birmingham. This guide explains how a C-Class, E-Class, GLC or AMG is taken without its key, and how a hidden immobiliser keeps the engine off until you disarm it. Fitted at home or at work from £249.
- Fitted from £249
- Factory key keeps working
- No subscription
How often Mercedes cars are stolen
The figures come from the DVLA.
Mercedes was the fourth most stolen car make in the UK in 2025. DVLA figures published by What Car? show 3,992 Mercedes cars reported stolen, behind Ford, BMW and Toyota. The C-Class was the most stolen Mercedes model, with 826 cars, although that was 26% fewer than in 2024.
| Make or model | Cars stolen in 2025 | UK rank |
|---|---|---|
| All Mercedes models | 3,992 | 4th make |
| Mercedes C-Class | 826 | Top 20 model |
Mercedes cars and vans are wanted for export and for parts, and many recent models start with Keyless-Go, which is why they stay on the list year after year.
How a Mercedes is stolen without the key
Each method fools the factory security, because it trusts the key signal and the car’s own network.
- Keyless-Go relay attack
- A receiver held near your door picks up the signal of the key in your house. A second device at the car repeats it, and the car opens and starts.
- A new key through the OBD port
- Inside the car, a programming tool plugged into the diagnostic socket can teach the car a new key. Older Mercedes models without Keyless-Go are taken this way.
- CAN injection
- Thieves reach the wiring behind a headlight and send the car the messages a genuine key would send. No key signal is involved.
- Lifted onto a truck
- A towed car is never started, so only a GPS tracker helps you find it.
Which Mercedes models we fit
Hatchback, saloon, SUV or van.
LockCAR immobilisers work on 12 V and 24 V vehicles, so they suit the whole range, from an A-Class to a Sprinter van. That includes the A-Class, C-Class, E-Class, GLA, GLC, GLE, S-Class and AMG versions, and the Sprinter and Vito vans.
Enter your registration in the Vehicle CHECK to confirm your car before you book. Van owners can read our Mercedes Sprinter immobiliser guide.
Choose how you disarm the immobiliser on your Mercedes
Made in the UK, paid for once.
The engine will not start until the immobiliser gets its own signal, so a relayed or newly programmed key is not enough. You choose what that signal is.
| Immobiliser | How you disarm it | Hands-free | Kit | Fitted |
|---|---|---|---|---|
| Fob (TAG), IC3262 | Carry the small TAG fob | Yes | £139 | £249 |
| Smart ring | Wear the paired ring | Yes | £149 | Ask us |
| Smartwatch | Wear your smartwatch, no extra fob | Yes | £160 | Ask us |
| PIN code, CAN-IMMO | Enter your sequence on the steering wheel buttons | With optional TAG | £189 | £299 |
Hands-free versions disarm as you sit in the car. The PIN version needs nothing in your pocket: you enter your sequence on the steering wheel buttons.
Why fit a LockCAR immobiliser to your Mercedes
- Your Keyless-Go keeps workingYou keep the factory key and everything it does. The immobiliser adds a second check before the engine starts.
- Hidden in the carThere is no LED or keypad to find. The installer places it out of sight.
- No subscriptionYou pay once for the unit and the fitting.
- Made in BirminghamQuestions go to the engineers who designed it.
How fitting works
Check and book
Send your model, year and postcode on WhatsApp, or use the Vehicle CHECK.
Fitting where the car is
A LockCAR approved installer fits the immobiliser at your home, at work or at an installation centre.
Pair and drive
Your TAG, ring, watch or PIN is paired and you are shown how it works.
LockCAR approved installers cover Birmingham and the West Midlands, including Sutton Coldfield, Erdington, Edgbaston, Harborne, Solihull, Dudley, Stourbridge, Halesowen, Wolverhampton, Wednesfield and Codsall, as well as Coventry, Kenilworth and Nuneaton. Send your postcode and we confirm the nearest installer.
Add a dashcam and GPS tracking
For an AMG or a car parked on the street, a dashcam system with a built-in immobiliser adds evidence, and the 4G versions add GPS tracking.
| System | What it includes | GPS tracker | Price |
|---|---|---|---|
| LockCar One | Dashcam + immobiliser | No | £450 |
| LockCar One Plus 4G | Dashcam + immobiliser + GPS tracker | Yes | £499 |
| LockCar Duo RH | Dual-camera dashcam + immobiliser | No | £550 |
| LockCar Duo RH Plus 4G | Dual-camera 4G dashcam + immobiliser + GPS tracker | Yes | £699 |
Questions from Mercedes owners
Which Mercedes models are stolen most?
In DVLA figures for 2025 published by What Car?, the C-Class was the most stolen Mercedes, with 826 cars. In total 3,992 Mercedes cars were reported stolen, the fourth highest of any make.
Does the immobiliser work with Keyless-Go?
Yes. Keyless-Go keeps working as before. The immobiliser only adds a second check, so the engine starts once it also gets your TAG, ring, watch or PIN.
How much does it cost?
Kits start at £139. Fitted by a LockCAR approved installer, the TAG version costs £249 and the PIN version £299. Dashcam systems with an immobiliser start at £450 fitted.
Can you fit it to a Sprinter or Vito van?
Yes. LockCAR immobilisers work on 12 V and 24 V vehicles. See our Sprinter guide for the van details.
Is LockCAR Thatcham approved?
Not yet. Our immobilisers are going through Thatcham Security Certification.
Written by the LockCAR engineering team. We design and build our immobilisers in the UK and fit them through our approved installers. Meet the engineers. Last updated October 2026.
Sources: What Car?, DVLA figures for 2025 obtained under Freedom of Information.
