EIS not reading the key
The ignition switch fails to recognise the fob.
Mercedes-Benz C-Class keys, 2007–present.
Covering W204 (2007–2014), W205 (2014–2021), W206 (2021–present). Send your registration and we'll confirm the exact key and method before we arrive.
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Let’s talk keys
Mercedes-Benz C-Class key quote.
Send your details and we’ll get back to you about your keys. For anything urgent, call us.
- Speak directly about your vehicle
- The right option for your key
- Understand the work before deciding
Our expertise
Mercedes-Benz C-Class key services.
01
Lost Car Key Replacement
Every key lost? We cut and programme a new one at your car — no tow, no dealer.
Explore service02
Spare Car Keys
A spare key cut and programmed at your car, before you ever need it.
Explore service03
Car Key Programming
Transponders, remotes and smart keys coded to your car on site.
Explore service04
Broken Car Keys
Snapped blades extracted, broken cases and dead buttons fixed — same visit.
Explore serviceModel faults
Mercedes-Benz C-Class problems we fix.
Steering lock (ELV) fault
The steering won't unlock so the car won't start.
Infrared key failure
Internal key faults stop the car starting even with a good battery.
Checklist
Have these to hand.
- Your registration number
- Photo ID matching the V5C (logbook)
- Any remaining keys, even broken ones
- Exact location and parking access
Key types
Turn key vs push-start on the Mercedes-Benz C-Class.
Bladed / flip key
The W204 uses a fob that slots into the EIS, with an emergency blade inside.
Keyless push-start
Keyless-Go proximity keys are common on W205 and W206.
Technical notes
The tech behind your Mercedes-Benz C-Class key.
- Mercedes encrypted key system linked to the EIS
- Key data commonly obtained by reading the EIS
- Newer generations have more limited aftermarket options
Systems vary by year and trim. We confirm the exact transponder and method from your registration.
FAQs
Mercedes-Benz C-Class key questions
Can you make a Mercedes-Benz C-Class key with none left?
Usually, depending on the generation. We confirm the method from your registration before quoting.
Is my Mercedes-Benz C-Class bladed or keyless?
The W204 uses a fob that slots into the EIS, with an emergency blade inside. Keyless-Go proximity keys are common on W205 and W206.
Will a Mercedes-Benz C-Class key from online work?
Sometimes, but many are the wrong chip or frequency. We check compatibility before we cut or code anything.
How much is a Mercedes-Benz C-Class key?
It depends on the key type and year. We quote on the call — no surprises at the vehicle.