2012 Mercedes-Benz S-Class
Key Replacement - Save vs Dealer in Ventura County
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2012 Mercedes-Benz S-Class
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2012 Mercedes-Benz S-Class Remote Head Key Replacement - Fast, Affordable & Professional
Got a call from a guy near Goleta Beach Park in Santa Barbara. His 2012 S-Class S550 was sitting in a parking area, dead to the world. Key turned in the EIS slot, dash lit up, but the starter did nothing. Just the message "Key not recognized" sitting there on the instrument cluster.
He had already called the Mercedes dealer. They wanted a tow-in, said three to five business days minimum because the Xentry diagnostic session had to confirm whether it was the key or the EIS module itself before they could even order parts. He was looking at days without the car and no clear answer on when he would get it back.
I drove out with the van. Plugged into the OBD port, pulled the EIS data, and confirmed it was reading the key's NEC chip intermittently. The transponder side of his original key had gone flaky, but the EIS module itself was still healthy. Good news, because an EIS replacement on these is a much bigger job.
Cut a fresh blade on the HU64 profile right there on the portable machine, programmed the new 5WK47283 remote head key to the EIS, synced the infrared and RF channels. Tested ignition, tested remote lock and unlock, tested panic. The whole thing took around 40 minutes.
He sat on the tailgate of a nearby truck watching the ocean the whole time. When I handed him the working key, he just nodded and said "that's it?" That was it.
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Mercedes-Benz S-Class Rapid Response, Done Right
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“About 15 minutes after calling, he was already at my home. I had lost my original Ford key and he made and programmed a new one on the spot. Very fast, very professional.”
“Super fast service. About 20 minutes from the call he was already there. He had an authentic replacement on hand and made a spare key for my 2017 Nissan Rogue in about 15 minutes. Great prices, friendly, and very professional.”
“Fast, affordable, and a great price. Marco did an amazing job and made a key for our Nissan Kicks quickly and professionally. Everything worked perfectly.”
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