Best tracker and immobiliser for a Mercedes-Benz C-Class
The best setup for a C-Class is a CAN-bus immobiliser with an S5 tracker. Keyless-Go relay and key programming are the main threats, and insurers often ask about trackers on Mercedes cars. The DVLA recorded 826 Mercedes-Benz C-Class thefts in 2025, number 14 on the UK list.
Our pick for the Mercedes-Benz C-Class
For the Mercedes-Benz C-Class we recommend S5 tracker + immobiliser, as dual layer protection.
Layer one: stop it leaving
A CAN-bus immobiliser so a relayed or programmed key cannot start the car.
Layer two: get it back
A Thatcham S5 tracker with driver recognition; S7 on older cars garaged off the street.
Worth adding
Switch off keyless where the car allows it, or keep the fob in a pouch.
Which setup suits your Mercedes-Benz C-Class
| Your car | Setup | Why |
|---|---|---|
| 2021 onwards (W206) | CAN-bus immobiliser and S5 tracker | New, valuable and keyless. |
| 2014 to 2021 (W205) | CAN-bus immobiliser and S5 or S7 tracker | Keyless-Go relay is the most common route. |
| AMG models | CAN-bus immobiliser and S5 tracker | High value and closely watched by insurers. |
Options compared for the Mercedes-Benz C-Class
| Option | Verdict | For this car |
|---|---|---|
| Tracker on its own | Partial | A relayed C-Class can still be driven away; the tracker helps only afterwards. |
| Immobiliser on its own | Good start | Stops relay and programmed-key starts, but insurers may still want a tracker. |
| S7 tracker + immobiliser | Good | Fair on an older W205 kept off the street. |
| S5 tracker + immobiliser | Our pick | The safest match for keyless C-Class cars and most insurer conditions. |
Do insurers want a tracker on a Mercedes-Benz C-Class?
Insurers often ask for a Thatcham tracker on AMG and newer C-Class cars. Check the category before fitting.
Mercedes-Benz C-Class tracker choices use the S5 and S7 Thatcham categories; S5 vs S7 explained; what insurers mean by approved.
Questions to ask your fitter
- Will the immobiliser work with Keyless-Go and the Mercedes app?
- Can I switch the keyless function off as well?
Mercedes-Benz C-Class tracker and immobiliser questions
What is the best tracker for a Mercedes C-Class?
Choose a Thatcham S5 tracker, so the car alerts if it moves without your driver tag, and put a CAN-bus immobiliser in front of Keyless-Go.
Can a Mercedes with Keyless-Go be relayed?
Yes, Keyless-Go is widely exploited by relay thieves. With a CAN-bus immobiliser fitted, an opened door no longer means a car that drives.
Do AMG C-Class cars need a tracker for insurance?
AMG models attract insurer conditions more than any other C-Class. Read the security clause in your schedule; if it names a Thatcham category, that is the one to fit.
More on the Mercedes-Benz C-Class
- Is my Mercedes-Benz C-Class at risk of theft? The full DVLA figures and why thieves pick it.
- How Mercedes-Benz C-Classs are taken: relay theft on keyless cars, key programming and cloned keys, key burglary.
- Check the theft risk where you park.
- Why an S5 tracker pairs with a Ghost immobiliser on cars like the Mercedes-Benz C-Class.
- Best tracker for other cars.
Get this setup fitted to your Mercedes-Benz C-Class
Send us the model year and where it is kept for a fitted quote. Get my Mercedes-Benz C-Class quote →
Mercedes-Benz C-Class theft figures: DVLA 2025 records (FOI) via What Car?. Advice checked 6 November 2026. Your insurer's wording always comes first. Trademarks belong to their owners.