The Mercedes 300SD 1978-1980 uses key code series HD, with 6,690 documented codes spanning the range HD4001-HD7350, ND4001-ND7350. Uses a 10-cut double-sided profile. Set the duplicator to flat-bottom cuts 0.1″ wide. Code is typically stamped on the original key bow or available via the VIN through the dealer. The lock is decodable with a Lishi tool — sign in for the specific match.
Code prefix
HD
Code range
HD4001-HD7350, ND4001-ND7350
Years
1978-1980
Total codes
6,690
Lishi decodable
Yes — sign in for tool name
Cuts per key
10
Last verified
Verification pending
Common questions
What key code series does the Mercedes 300SD 1978-1980 use?
The Mercedes 300SD 1978-1980 uses key code series HD, with 6,690 documented codes ranging from HD4001-HD7350, ND4001-ND7350.
Can the Mercedes 300SD 1978-1980 lock be decoded?
Yes. A Lishi-style 2-in-1 decoder reads the door or ignition lock without disassembly, revealing the bitting code that can be cross-referenced against this series' key code database. The specific Lishi tool match for this vehicle is available to signed-in locksmiths.
How many cuts does a Mercedes 300SD 1978-1980 key have?
10 cuts on a double-sided profile. Each cut position has a depth value documented in the bitting code, which determines the key cutting pattern.
Get the full code list — $9.99/mo, 3-day free trial.Sign in to view bittings, depths, and Lishi cut maps for this series.