Decode Your VIN
Enter your vehicle's VIN code to discover all technical specifications. The VIN consists of 17 alphanumeric characters.
Decode any Mercedes-Benz 300 VIN free. Type the 17-character number from your 300D, 300E, 300SD, 300SE, 300SL, 300CE, 300TE, 300GD, or any other 300-badged Mercedes into the decoder above and pull the exact chassis (W123, W124, W126, W140, R107, R129, R463), model year, engine family, transmission, plant, and options. No sign-up.
This page is the dedicated 300-Class hub. Unlike modern C-Class or E-Class, the 300 designation was used across many different chassis and body styles from the 1970s through the 1990s. The VIN is the only way to identify exactly which 300 you’re looking at.
About Mercedes-Benz 300-badged vehicles
The 300 badge appeared on dozens of Mercedes models over four decades:
| 300-badged model | Chassis code | Years | Body / segment |
|---|---|---|---|
| 300D / 300CD / 300TD | W123 | 1975 to 1985 | Sedan, coupe, wagon (diesel, OM617) |
| 300E / 300CE / 300TE / 300D 2.5 Turbo | W124 | 1984 to 1995 | Sedan, coupe, wagon (petrol M103, diesel OM603) |
| 300E 4Matic | W124 | 1987 to 1995 | First 4Matic Mercedes sedan |
| 300SD / 300SDL / 300SE / 300SEL / 300SD Turbo | W126 | 1979 to 1991 | Full-size sedan (S-Class predecessor) |
| 300SE / 300SEL / 300SD | W140 | 1991 to 1993 | S-Class sedan (renamed S320 in 1994) |
| 300SL | R107 | 1985 to 1989 | European market roadster (petrol M103 straight-six) |
| 300SL | R129 | 1989 to 1993 | Roadster (renamed SL320 in 1994) |
| 300GD | W460 / W461 / W463 | 1979 to 1994 | G-Wagen with OM603 3.0L I5 diesel |
| 300CE-24 | W124 coupe | 1989 to 1993 | 24-valve M104 twin-cam I6 |
The chassis code lives in positions 4 to 6 of the VIN. This is the fastest way to sort a 300D W123 from a 300E W124 from a 300SD W126 when the 300 badge appears on so many different cars.
Mercedes-Benz 300 WMI codes (positions 1 to 3)
| WMI | Country | Plant | Applies to |
|---|---|---|---|
| WDB | Germany | Sindelfingen / Bremen | Every 300-badged Mercedes (all chassis) |
Every genuine 300 carries a WDB WMI. Mercedes did not introduce WDD until 1999, well after most 300-badged models had ended production.
How to decode a Mercedes 300 VIN, position by position
Positions 1 to 3: WMI
WDB on any 300 built during the ISO 3779 era (1980 onward).
Positions 4 to 8: VDS
Positions 4 to 6 tell you which 300 you have:
| Chars 4 to 6 | Meaning |
|---|---|
| 123 | W123 (300D, 300CD, 300TD, 300TD Turbo) |
| 124 | W124 (300E, 300CE, 300TE, 300D, 300D 2.5 Turbo, 300E 4Matic, 300CE-24) |
| 126 | W126 (300SE, 300SEL, 300SD, 300SDL, 300SD Turbo) |
| 140 | W140 (300SE, 300SEL, 300SD, 1991 to 1993) |
| 107 | R107 (300SL, European market only) |
| 129 | R129 (300SL, 1989 to 1993 before rename to SL320) |
| 460 / 461 / 463 | G-Class (300GD) |
Position 7 encodes body style and restraint. Position 8 identifies the engine:
| Char (pos 8) | Engine | Fitment |
|---|---|---|
| 1 | OM603 3.0L I6 diesel (naturally aspirated) | 300D W124, 300SD/SDL W126, 300GD |
| 2 | OM603 3.0L I6 turbo diesel | 300D Turbo W124, 300SD Turbo W126 |
| 3 | M103 3.0L I6 12-valve petrol | 300E, 300CE, 300TE, 300SE, 300SEL W126, 300SL R107/R129 |
| 4 | M104 3.0L I6 24-valve petrol | 300CE-24, 300E-24, 300TE-24, 300SL-24 |
| 5 | OM617 3.0L I5 turbo diesel | 300SD W126 (early), 300CD Turbo W123 |
| 8 | OM617 3.0L I5 non-turbo diesel | 300D W123, 300CD W123, 300TD W123 |
| 9 | OM606 3.0L I6 24-valve diesel | 300D W140, 300SD W140 (late) |
Position 9: Check digit
Calculated from the other 16. Enforced on US-market 300 models by NHTSA from 1981 onward.
Position 10: Model year
| Char | Year | Char | Year |
|---|---|---|---|
| A | 1980 | K | 1989 |
| B | 1981 | L | 1990 |
| C | 1982 | M | 1991 |
| D | 1983 | N | 1992 |
| E | 1984 | P | 1993 |
| F | 1985 | R | 1994 |
| G | 1986 | S | 1995 (final 300E year) |
| H | 1987 | ||
| J | 1988 |
Position 11: Assembly plant
F for Sindelfingen or G for Bremen on most 300s. G-Class variants built at Graz, Austria (Magna Steyr).
Positions 12 to 17: Serial number
Production sequence stamped on your specific 300. Combined with the previous 11 characters, every 300 VIN is globally unique.
Common 300 variants explained
- 300D: Diesel sedan (W123 with OM617 5-cyl or W124 with OM603 6-cyl)
- 300E: Petrol sedan (W124 with M103 12-valve, later M104 24-valve as 300E-24)
- 300CE: Coupe version of W124
- 300TE: Wagon version of W124
- 300SD/SDL: Diesel W126 S-Class (US-market, initially with OM617 turbo, later OM603 turbo)
- 300SE/SEL: Petrol W126 S-Class
- 300SL: European-market R107 with M103 six (not to be confused with the modern SL 300)
- 300GD: G-Wagen with OM603 3.0L I5 diesel
Where to find the VIN on a Mercedes 300
- Driver-side dashboard, visible through the windshield
- Driver-side B-pillar Datacard sticker
- Stamped on the firewall in the engine bay
- Stamped on the strut tower under the hood
- Stamped on the engine block, top rear near the firewall
- Vehicle title, registration
Mercedes 300 known issues
Given the 20-year production span across many chassis, common issues vary by generation. W123 diesel owners should watch trunk floor rust and injection pump wear; W124 owners should monitor wiring harness insulation (a well-documented 1990s issue), 4Matic front differential leaks, and M104 head gasket wear on the 24-valve variant; W126 owners should watch OM603 head gasket cracks on the 300SDL; R107 300SL owners should monitor evaporator leaks.
To check a specific 300:
- Decode the VIN with the tool above to confirm the exact chassis series and model year
- Cross-reference the 17-character VIN with the Mercedes-Benz USA recall lookup and the NHTSA recall database
- Contact your nearest Mercedes-Benz authorised service centre for any open campaign repair
Frequently asked questions
How do I decode a Mercedes-Benz 300 VIN?
Type the 17-character VIN from the dashboard, B-pillar sticker, or title into the decoder at the top of this page. Results include exact model (300D vs 300E vs 300SD etc.), chassis (W123, W124, W126, W140, R107, R129, or G-Class), model year, and plant. No sign-up.
What’s the difference between 300D and 300E?
The 300D was diesel; the 300E was petrol. Both existed on W123 (300D only, no 300E) and W124 (both existed). Position 8 of the VIN tells you: 1 or 2 or 8 for diesel variants, 3 for the M103 petrol, 4 for the M104 24-valve petrol.
Is the 300SL the modern SL or the 1954 Gullwing?
Neither. The 300 badge on the 1954 300SL Gullwing was on a completely separate 300 model line. The 1985 to 1989 R107 300SL and 1989 to 1993 R129 300SL used the 300 name to indicate the M103 3.0L I6 engine. The modern SL 300 (part of the R231 or R232 SL) is a separate matter. For the current SL, see our SL-Class VIN decoder page.
Is the Mercedes 300 VIN decoder free?
Yes. VinDecoderPlus decodes every 300 VIN free of charge with no sign-up. Given the collector value of many 300 variants (especially 300SL, 300SD Turbo, 300CE-24 AMG), we recommend cross-checking with Mercedes Classic Center for high-value transactions.
Can a 300 VIN be faked?
The B-pillar Datacard can be replaced, but the firewall, strut-tower, and engine block stamps are physically tied to the car. Because many 300-badged models are now collector items, VIN cloning is a documented risk. The guide how to check if a car is stolen by VIN walks through the verification steps.
Decode any Mercedes 300 VIN free
Type your 17-character 300 VIN into the decoder at the top of this page for an instant breakdown. For related reading:
- Mercedes-Benz VIN decoder hub for the brand-wide guide
- How to read a VIN number for the general standard
- What every character in a VIN means for a position-by-position reference
- VIN decoder vs. vehicle history report for what a decode covers vs. what it doesn’t
