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2008 Mercedes-Benz S-Class
Key Replacement - Save vs Dealer in Ventura County

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2008 Mercedes-Benz S-Class Remote Head Key
Remote Head Key

Licensed by the California BSIS, NASTF certified, Google Guaranteed, and backed by over 1,000 five-star reviews. When you call EZ Car Keyz, you're getting a verified professional.

CA BSIS LICENSE LCO#6792
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min arrival
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2008 Mercedes-Benz S-Class key fob price quote from EZ Car Keyz Santa Barbara CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • Oxnard, CA
15+
Yrs Exp
2008 Mercedes-Benz S-Class key fob price quote from EZ Car Keyz Santa Barbara CA
Key specialists
BSIS Licensed
Licensed by the California Bureau of Security
Fixed pricing
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805 Special
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2008 Mercedes-Benz S-Class
Key Options

Dealer-grade key for a fair, honest price

Remote Head Key
Most popular Mercedes-Benz key typeMost Popular
2008 Mercedes-Benz S-Class Remote Head Key IYZ-3312
FCC IDIYZ-3312Part #5WK47283Buttons4BatteryCR2025Frequency315 MHzRemote StartNo
✓ In Stock · Programmed On-Site
Discount 2008 Mercedes-Benz S-Class transponder key from EZ Car Keyz Santa Barbara CA
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Discount 2008 Mercedes-Benz S-Class transponder key from EZ Car Keyz Santa Barbara CA
🔧 PRO TIP
The 2008 S-Class (W221) runs NEC-based key encryption through the EIS/EZS module, part number A221 545 09 08 on most builds. If your remote head key (5WK47283) is acting up, check the CR2025 first, but know that a weak battery won't cause a no-start on these. The transponder is passive and powered by the EIS coil. If the key turns but the engine cranks and dies, that's an immobilizer rejection, not a battery issue. Two different problems, two different fixes.
Related services: Ignition Repair · Smart Key

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EZ Car Keyz
EZ Car Keyz
Dealership
Average Cost
✓ $$
✕ $$$$
Location
✓ We come to you
✕ You drive there
Wait Time
✓ 20-45 min
✕ 2-5 days
Same-Day
✓ Yes
✕ Rarely
All Keys Lost
✓ No problem
✕ Tow required
OEM Quality
✓ Yes
✓ Yes
EZ Car Keyz wins 5 out of 6
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2008 Mercedes-Benz S-Class Remote Head Key Replacement - Fast, Affordable & Professional

Got a call from a guy near El Presidio State Historic Park in Santa Barbara. His 2008 S-Class was sitting in a parking area, completely dead to him. No keys at all. Lost one a year ago, never replaced it, then the remaining one went through the wash in his jacket pocket. He'd already called the Mercedes dealer and they told him it would be a tow-in, a wait of five to seven business days, and a bill that made him go quiet on the phone.

I drove out with everything I needed for a W221 all-keys-lost.

These jobs are layered. The EIS module on the W221 talks to the ECU through an encrypted handshake, and every stored key has to be wiped before new ones go in. I connected through the OBD-II port, read the EIS data, and ran the AKL procedure to clear the old key profiles. Cut a fresh 5WK47283 remote head key to factory spec using the key code pulled from the EIS, then programmed the transponder and synced the four-button remote.

The part that always gets a reaction: turning the key and hearing the engine catch on the first try. He just sat there for a second with his hands on the wheel, like he was making sure.

Tested the remote lock, unlock, trunk, and panic. Checked for immobilizer fault codes. Clean across the board. He drove home that afternoon instead of waiting a week.

Save vs the Dealer on Your Mercedes-Benz S-Class Key

Get your key for hundreds less than the dealer. Same quality, same result, better price.

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BSIS Licensed Locksmith - California License LCO#6792
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Also serving: Downtown Santa Barbara · Eastside Sb · Funk Zone · Hope Ranch

Mercedes-Benz S-Class Rapid Response, Done Right

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Low cost 2008 Mercedes-Benz S-Class car key service by EZ Car Keyz Santa Barbara CA
Remote Head Key | Rapid On-Site Service
2008 Mercedes-Benz S-Class | Ventura County
Low cost 2008 Mercedes-Benz S-Class car key service by EZ Car Keyz Santa Barbara CA
2008 Mercedes-Benz S-Class Remote Head Key
2008 Mercedes-Benz S-Class
Remote Head Key | Pro Grade Service
Estimated arrival time to Santa Barbara
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Service location Santa Barbara
Santa Barbara
Insured Service
805 Area
Same-Day Keys (805) 790-8162

Five Stars From Verified Customers

Reviews that back up our credentials

A
Alexx C.
Dec 2025
★★★★★

“My key fob stopped working while I was at Oxnard Harbor and I thought I was going to need a tow. EZ Car Keyz showed up fast, programmed a new fob, checked everything carefully, and made sure the car was fully functional before leaving.”

Google Review
M
Mark F.
Feb 2024
★★★★★

“Needed a spare car key made and chose EZ Car Keyz based on their reviews. The reviews were right. They gave me the best price, responded quickly to all my questions, came to my workplace, cut the keys on site, and finished fast.”

Yelp Review
S
Sonia V.
Feb 2024
★★★★★

“Marco came out quickly, cut and programmed a new BMW key fob fast, and was extremely polite and professional.”

Yelp Review
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Dealer vs locksmith review for 2008 Mercedes-Benz S-Class key - EZ Car Keyz Santa Barbara CA
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Dealer vs locksmith review for 2008 Mercedes-Benz S-Class key - EZ Car Keyz Santa Barbara CA
5.0 out of 5 - Based on Over 1,000 five-star Google reviews
Best Price (805) 790-8162

Mercedes-Benz S-Class Mobile Service FAQ

Real costs, no dealer surprises

Why is replacing a 2008 Mercedes-Benz S-Class key so expensive?
It comes down to the EIS/EZS module and NEC chip encryption. Your W221 doesn't just match a cut pattern. The EIS (A221 545 09 08 on most S-Class builds) runs a rolling encrypted exchange with the transponder inside the 5WK47283 key head every time you turn the ignition. Programming a new key means reading the EIS, generating a valid crypto profile, and writing it to both the key and the module. The dealer uses Xentry/DAS connected to their online server for this, and they bill for every step plus the wait. A mobile locksmith with the right NEC-capable tools does the same work on site for a fraction of what they charge.
What is a remote head key and how does it differ from a Mercedes smart key?
How does a locksmith compare to the dealer for a W221 S-Class key replacement?
My W221 key turns but the engine cranks and immediately dies. Is the key bad?
Can the EIS module itself fail on a 2008 S-Class, and how would I know?
Questions? Call (805) 790-8162

Mercedes-Benz S-Class Key Service Areas

Trusted by thousands across the area

📍Ventura County & SB
Ventura County service area map
805 LOCAL LOCKSMITH
need a key? 🔑
Santa Barbara
Santa BarbaraETA 30-35 min
Goleta
GoletaETA 30-35 min
Isla Vista
Isla VistaETA 30-35 min
Montecito
MontecitoETA 25-30 min
Carpinteria
CarpinteriaETA 20-25 min
Ojai
OjaiETA 20-25 min
Ventura
VenturaETA 10-15 min
Santa Paula
Santa PaulaETA 20-25 min
Fillmore
FillmoreETA 25-30 min
Oxnard
OxnardETA 10-15 min
Port Hueneme
Port HuenemeETA 10-15 min
Camarillo
CamarilloETA 15-20 min
Moorpark
MoorparkETA 25-30 min
Simi Valley
Simi ValleyETA 30-35 min
Thousand Oaks
Thousand OaksETA 20-25 min
Santa BarbaraGoletaMontecitoCarpinteriaOjaiVenturaSanta PaulaFillmoreOxnardPort HuenemeCamarilloMoorparkSimi ValleyThousand Oaks
Low cost 2008 Mercedes-Benz S-Class key replacement area in Ventura County CA
Low cost 2008 Mercedes-Benz S-Class key replacement area in Ventura County CA
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