2006 Mercedes-Benz C-Class
Key Replacement - Save vs Dealer in Ventura County
Licensed & Insured | Mobile Key Experts

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2006 Mercedes-Benz C-Class
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2006 Mercedes-Benz C-Class Replacement - Fast, Affordable & Professional
Got a call from someone over near Las Posas Plaza in Camarillo. Only key to a 2006 C-Class, and it was gone. Not in the couch, not in the jeans, just gone. She had already called the dealer and they told her three to five business days because the key had to be ordered to VIN and then scheduled for programming through their service department.
I pulled up with the blanks already in the van.
All-keys-lost on a W203 means reading the EIS module, which on this year is the NEC-based FBS3 platform. I connected through the OBD port, pulled the EIS data, calculated the key password, and wrote the new transponder. Then I decoded the HU64 lock on the driver door and cut the blade to match. Four-button remote head key, part number 5WK47283, FCC ID IYZ-3312, fresh CR2025 seated in the slide tray.
The whole thing took about 40 minutes. Most of that was the password calculation cycling through, which is just a waiting game on NEC chips.
She sat on a bench nearby scrolling her phone. When I handed her the key and the car started, she just said "that's it?" Like she expected more drama.
No tow to the dealer, no waiting out the week. Same afternoon, same parking lot, done.
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“Tim went above and beyond. I struggled all day trying to program a new FOB and nothing worked. Tim helped me patiently, even recommending cheaper options since I was on a tight budget. He eventually came all the way to Ojai late at night and fixed everything.”
“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.”
“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.”
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