2013 Mercedes-Benz S-Class
Key Replacement - Save vs Dealer in Ventura County

2013 Mercedes-Benz S-Class Remote Head Key Replacement - Fast, Affordable & Professional

Got a call from someone near Douglas Family Preserve in Santa Barbara. He had a 2013 S550, and his chrome SmartKey had taken a fall onto tile. The case cracked along the seam, the chrome side plate popped loose, and the panic button was dangling by its contact pad. He said the car still started if he held the key together with both hands, but the Keyless-Go door handles stopped responding.

I met him in the driveway and opened the fob on my tailgate. The CR2025 was fine, terminals looked clean, but the antenna coil ribbon near the bottom of the board had partially torn from the housing flexing on impact. That coil is what talks to the EIS module at short range, door handles included. Start button still worked because it has a backup reader in the steering column that picks up the transponder at close contact.

Transferred the full electronics, the transponder board, and a fresh CR2025 into a new housing with a clean HU64 blade cut to his existing code. Tested all four buttons, Keyless-Go on every door handle, trunk release, and a full start cycle.

The whole thing took about 25 minutes on site. He had been looking at the dealer route, a week wait for parts plus a shop visit. Instead, he watched it happen on the hood of his own car in Santa Barbara and drove off the same afternoon.

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