Mercedes-Benz 400 Automotive Locksmith

The Mercedes-Benz 400 was produced 1992–1993. It is a discontinued passenger car, which mainly affects blank and fob availability rather than whether the work can be done — older platforms are frequently easier to key than new ones, not harder.

Across its 1992–1993 run, the 400 sits in one key generation: model years 1992–1993 predate transponder immobilizers in the US market, so a replacement there is usually a cutting job rather than a programming one. The exact model year and trim still decide the parts, so have the year ready when you call.

At 33+ years since the last Mercedes-Benz 400 was built, wear is the usual reason a key stops working rather than failure of the key itself. A cylinder that has accepted the same key for decades eventually stops aligning to it, and a key cut fresh to code often works better in that lock than the worn original it replaces.

Eligibility for the Mercedes-Benz 400 is confirmed against the exact model year and trim before a job is treated as scheduled, and proof of identity and vehicle ownership or written authorization is required before any key is originated or programmed.

Other Mercedes-Benz models from the same era

• Mercedes-Benz 600 1992–1993
• Mercedes-Benz C-Class 1994–2026
• Mercedes-Benz E-Class 1994–2027
• Mercedes-Benz S-Class 1994–2026
• Mercedes-Benz SL-Class 1994–2009 and again 2011–2027
• Mercedes-Benz M-Class 1995–2011 and again 2016–2019
• Mercedes-Benz 560 1986–1991
• Mercedes-Benz CL-Class 1998–2014