Mercedes-Benz car key replacement in Buffalo Grove, IL
Lost, broken or worn Mercedes-Benz key? Here is how Mercedes-Benz key and immobilizer systems work, what to try first, and what to have ready when you call Mr Locksmith in Buffalo Grove, IL.
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How Mercedes-Benz immobilizers work
Mercedes-Benz uses the FBS (Fahrberechtigungssystem) family: FBS3 on many older vehicles and FBS4 on many newer ones. FBS4 is a genuinely different problem — on many model years new keys are produced through Mercedes-Benz dealer channels, and any offer of a quick, cheap FBS4 key deserves questions.
No locksmith can honestly promise every Mercedes-Benz model and year. Whether a key can be made for yours — and where — depends on the year and system. Call (312) 478-6125 with the year, model and VIN and ask before anyone is dispatched. Mr Locksmith is an independent locksmith and is not affiliated with Mercedes-Benz.
Common Mercedes-Benz key types
- Smart key (chrome or black key)
- Infrared key
- Keyless-Go proximity key
All keys lost on a Mercedes-Benz
For FBS3 vehicles, all-keys-lost is generally possible outside the dealer with the right equipment. For FBS4 vehicles, the honest answer for many years is the dealer. Knowing which system your car has before anyone is dispatched saves a wasted call-out.
Worth knowing
Many Mercedes keys are replaced when the real fault is a worn electronic ignition switch (EIS) or a failing electronic steering lock (ESL). Diagnosing before buying a key can save the cost of the key entirely.
Before you call about a Mercedes-Benz key
- The year, model and trim of your Mercedes-Benz
- The VIN — visible through the windshield on the driver's side, or on the registration
- Whether any working key or fob still exists
- Where the vehicle is: driveway, street, parking garage level or commuter lot
When the technician arrives, expect to be asked for photo ID and proof of ownership — the registration, the title, or a lease or financing agreement in your name.
Mercedes-Benz key services
Each page explains how that job works and what to have ready. Call with the year, model and VIN to ask whether your Mercedes-Benz can be done.
Common questions
My Mercedes-Benz key fob battery died — how do I start the car?
On many Mercedes models with Keyless-Go, the start/stop button pulls out of the ignition lock; insert the key in its place and turn it. Newer models without an ignition slot have a marked backup spot, usually on the steering column. The emergency key blade slides out of the fob.
What does adding a spare Mercedes-Benz key involve?
Mercedes-Benz keys are traditionally ordered through a dealer and produced by Mercedes for the specific vehicle, after ownership verification. On FBS3 vehicles some independent options exist; on FBS4 vehicles the dealer route is usually the only one. Expect a wait while the key is made.
Locked out or need a lock fixed? Call (312) 478-6125.
We answer 24 hours a day, every day. Tell us where you are and what happened, and ask about the price before a technician is sent.