2003 Mercedes-Benz Ml-Class
Key Replacement - Save vs Dealer in Ventura County

2003 Mercedes-Benz Ml-Class Remote Head Key Replacement - Fast, Affordable & Professional

Got a call from a guy in the La Colonia neighborhood in Oxnard. His 2003 ML350 had one key left and the buttons were doing nothing. Lock, unlock, panic, trunk, all dead. He was manually locking the doors with the key blade every time he parked.

He told me Mercedes of Oxnard quoted him days just for the key blank to arrive from Germany, plus a separate appointment to program it after that. He did not have weeks to wait around with one half-working key.

I pulled up to his driveway, popped the old key open, and the CR2025 inside looked original. Corroded contact plate, battery practically flat. Swapped it, and the buttons came back to life on the spot. That alone changed his whole mood.

Then I cut a fresh spare on the HU64 blank, matched to his door and ignition. Hooked into the OBD-II port with the diagnostic head, wrote the new transponder into an open EIS slot, and synced the IR remote. Tested both keys through the full cycle: ignition start, all four buttons, door locks, liftgate release.

He sat on his front steps the whole time, just watching. When I handed him two working keys he kind of laughed and said he had been dreading this for months.

One visit. Both keys done in his driveway. He kept his whole afternoon.

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