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Mercedes CLA Key Replacement
Mercedes CLAs have been on Dallas–Fort Worth roads since the 2014 era, and across 1 key generation this model has used 1 different key system — smartkey / keyless go. Whichever yours is, DFW Keys 4 Cars cuts and programs it at your location, 24/7: spare keys, lost-everything replacements, fob programming, and lockouts. Call (214) 717-6398.
About CLA Keys
The table below is our verified key reference for the Mercedes CLA — model years, key types, and the transponder/immobilizer family each generation uses. Generations overlap at boundary years, and trim levels (keyed vs. push-to-start) can differ within the same year, so we always confirm the exact part by VIN before dispatching.
| Model / Generation | Years | Key Type | Transponder / Immobilizer | Blade / FCC |
|---|---|---|---|---|
| CLA-Class (C117) | 2014–2019 | SmartKey / Keyless Go | FBS4 | HU64 |
Security System & Immobilizer
Mercedes pairs its infrared SmartKey with the EIS/EZS ignition module under the FBS3 (and now FBS4) security scheme — the reason generic tools fail and dealer quotes run high. Our Mercedes-capable equipment programs FBS3 keys on-site.
On the CLA specifically, the immobilizer families we see are: FBS4. A key that is cut correctly but not programmed to this system will turn the locks and never start the engine — programming is the half of the job that matters.
Which key does your year have?
- 2014–2019: SmartKey / Keyless Go — FBS4 (HU64)
Our CLA Key Services
- Key replacement — lost, stolen or broken CLA keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — the cheap insurance; most CLA spares are done in one short visit
- Fob & transponder programming — remotes, fobiks and smart keys paired to the immobilizer, including proximity fobs
- Lockout service — damage-free entry when the keys are inside, 24/7
- Ignition repair — worn cylinders and keys that won’t turn
Mercedes CLA Key FAQ
I lost the only key to my CLA. What now?
We come to the vehicle, verify ownership, cut a new key from the VIN, and program it on-site. No tow, no dealer wait — this is our most common CLA call.
My CLA is push-to-start. Can you really program that outside the dealer?
Yes. Late-model CLAs (2014–2019) use a proximity smart key on the FBS4 system — our trucks carry the fobs and the programmer. We cut the emergency blade too.
How fast can you reach my CLA in DFW?
We dispatch the nearest mobile unit across the whole metroplex, 24/7. Call (214) 717-6398 with your location and we’ll give you an honest ETA.