What "all-keys-lost" means on a Mercedes
Modern Mercedes vehicles (W204, W205, W212, W213, W222, W463) use an Electronic Ignition Switch (EIS) and an Electronic Steering Lock (ESL) that hold encrypted keys to the immobilizer. With no working original key, the new key has to be programmed by reading the EIS data — either via OBD with AVDI / FVDI / Autel IM608, or on the bench depending on chassis and year.
What an actual Dallas mobile-locksmith visit looks like
Not Your Basic Locksmith arrives in the service van with the programming hardware. He connects to OBD-II, reads the EIS data, generates a new transponder key on the spot, and pairs it to the EIS. On older W204 models the ESL may need attention as well. The whole job is typically 60–90 minutes in your driveway — no tow to the Mercedes dealer required.
Cost vs the Mercedes dealership
Mercedes dealerships in Dallas typically quote $900–$1,800 for an all-keys-lost programming, plus a $150–$300 tow because the vehicle cannot drive there. Mobile locksmith pricing for the same work generally runs $400–$800 and includes the on-site programming. The math favors the mobile locksmith unless your vehicle is under an active Mercedes warranty that covers the programming.
