Mercedes-Benz Car Key Exeter — Replacement, Programming & Lockout
Mobile Mercedes-Benz key specialist covering Exeter and Devon — HU64, EZS fault, NEC module, KESSY smart key and Sprinter van cover. Fixed price, 24 hours.
Mercedes-Benz key programming requires brand-specific equipment across several distinct systems — from the infrared key on W203 and W204 C-Class to the NEC module on older vehicles, the EZS fault common on W212 E-Class cars, and the Sprinter all-keys-lost situations we attend weekly across Devon's trade sector. We carry Mercedes-specific diagnostic equipment to resolve it at your vehicle, same day, at a fraction of dealer cost.
Mercedes-Benz Models We Cover in Exeter
Key types and programming systems vary across Mercedes-Benz’s range. Every model below is covered across Exeter and Devon.
Don't see your Mercedes-Benz? Call 01392 925673
The models above cover our most frequent Mercedes-Benz jobs across Exeter and Devon. We cover every Mercedes-Benz model sold in the UK — all variants and older discontinued models.
Mercedes-Benz Key Systems — What You Need to Know
Mercedes-Benz has used several distinct key systems — from the infrared key on W203/W204 C-Class to the NEC module on older models and the advanced KESSY system on newer vehicles. The system your Mercedes uses determines the equipment required.
Mercedes key systems — overview
Mercedes-Benz uses several key architectures. The most important distinction is between the infrared key used on W203/W204 C-Class and W211/W212 E-Class, the NEC module on older models, and the modern KESSY smart key used on post-2015 vehicles.
Mercedes key system evolution
Mechanical / early transponder
NEC module — EIS first gen
EZS / infrared key
EIS2 / smart key transition
KESSY / advanced smart key
Key profiles we carry for Mercedes-Benz
- HU64 — standard Mercedes blade. C-Class W203–205, E-Class W211–213, A-Class W169/176, B-Class, Vito W639, older S-Class. Most common profile we cut.
- Sprinter profiles — W906 uses NE66 or YM15 (Dodge-derived on some variants). W907 moved to HU64. Always confirm Sprinter year.
- Infrared key — W203/W204 C-Class, W211/W212 E-Class. Same HU64 cut, infrared emitter in key head communicates with steering column receiver.
- Smart key / KESSY — W205+, W213+, W177+, all GLC/GLE/GLS. Passive entry, push-button start. Mercedes KESSY OBD protocol.
The DVLA registration is used to verify ownership before all-keys-lost work.
Infrared key: W203/W204 C-Class, W211/W212 E-Class — key points at steering column
NEC module: W210 E-Class, W220 S-Class, W163 ML — EEPROM/OBD system
KESSY smart key: W205+, W213+, W177+, GLC/GLE/GLS — passive entry, push-button start
Mercedes key pricing varies by chassis code, year and key system. EZS infrared keys and KESSY smart keys involve different processes to standard HU64 transponder keys. Fixed all-in price quoted before travelling.
- › HU64 transponder key (C, E, A, B-Class)
- › Infrared key (W204 C-Class, W212 E-Class)
- › KESSY smart key (GLC, GLE, W205+)
- › Sprinter van keys (W906 and W907)
Call 01392 925673 with your Mercedes chassis code or model and year. No call-out fee.
Common Mercedes-Benz Key Problems We Fix in Exeter
The most frequent Mercedes-Benz key faults we attend across Exeter, Devon and Somerset.
How We Programme Mercedes-Benz Keys On-Site
Mercedes key programming varies by chassis code and key system. Here is what happens when you call us for a Mercedes key in Exeter or Devon.
ⓘ For EZS fault diagnosis (W204/W212), we assess whether the EZS module or the key is the root cause before recommending replacement. For all-keys-lost, ownership verification is required.
Mercedes-Benz Services Available in Exeter
Every service available for all Mercedes-Benz models across Exeter, Devon and Somerset.
Frequently Asked Questions — Mercedes-Benz Car Keys Exeter
How much does a Mercedes car key replacement cost in Exeter?
Mercedes key pricing varies by chassis code, year and key system. Infrared key models (W204, W212), KESSY smart key models and Sprinter vans involve different processes. Fixed all-in price before travelling. No call-out fee. Call 01392 925673 with your Mercedes model or chassis code and year. See our pricing page.
What is the EZS fault on Mercedes W204 and W212?
The EZS (Electronic Ignition Switch) module on the steering column of W204 C-Class (2007–2014) and W212 E-Class (2009–2016) is a known point of failure. The module itself fails, not the key. Symptoms include key turning but car not starting or dashboard remaining blank. We diagnose whether EZS or the key is the fault, replace the EZS on-site and reprogram the key to the new unit.
Do you cover Mercedes Sprinter van keys in Exeter?
Yes — Sprinter van all-keys-lost and spare key is one of our most frequent commercial callouts. W906 (2006–2018) and W907 (2018+) use different key systems. Always confirm your Sprinter year when calling. We attend Exeter trade premises and Marsh Barton regularly.
Can you programme a Mercedes key without the original?
Yes — in most cases. All-keys-lost is available for NEC module (older models), infrared key (W204/W212), HU64 transponder and KESSY smart key. Method depends on chassis code and year — we confirm on the call before quoting and travelling.
My Mercedes KESSY smart key is not being detected — what should I do?
Most common cause is a depleted CR2032 key battery. Replace it first. If detection still fails, the key may have lost KESSY sync with the vehicle. We diagnose via OBD before recommending replacement — call before ordering a new smart key.
Do you cover older Mercedes models like the W210 and W220?
Yes — W210 E-Class and W220 S-Class use NEC module systems often requiring EEPROM reading rather than standard OBD. W163 ML and older models also covered. Call with the chassis code and year and we will confirm coverage immediately.
Is a Mercedes replacement key from you as good as a dealer key?
Yes — the credential programmed to your Mercedes immobiliser is identical whether programmed by us or a dealer. Both use Mercedes OBD diagnostic protocol. The HU64 or smart key blank we supply is from the same professional supply chain. The difference is price and on-site convenience.
How long does Mercedes key programming take?
Standard HU64 transponder key: 30–50 minutes. Infrared key (W204/W212): 45–70 minutes including EZS check. KESSY smart key: 50–75 minutes. EZS module replacement and re-key: 75–120 minutes. All-keys-lost: 75–120 minutes. Accurate estimates on the call.
Mercedes-Benz Key Services Across Exeter & Devon
Other Car Brands
Need a Mercedes-Benz Key in Exeter or Devon?
Tell us your Mercedes model or chassis code when you call. We confirm the key system and method, then give you a fixed price — before we travel. No call-out fee, available 24 hours.