Mercedes-Benz S123 250 T (129 hp)
Gasoline engine with 129 hp (95 kW) and 145 lb-ft (196 Nm), built 1977–1979, station wagon body, rear-wheel drive. The Mercedes-Benz S123 has 3 more powerful gasoline versions.
EnlargePower129 hp (95 kW)
Torque145 lb-ft (196 Nm)
0–62 mph11.9 s
Top speed115 mph (185 km/h)
FuelGasoline
Specifications
Engine
| Engine version | 250 T (129 hp) |
|---|---|
| Engine code | M 123 V 25 / 123.920 |
| Displacement | 2.5 L (2,525 cm³) |
| Cylinders | 6 |
| Cylinder layout | Inline |
| Engine position | Front, Longitudinal |
| Valves per cylinder | 2 |
| Valvetrain | SOHC |
| Fuel system | Carburetor |
| Compression ratio | 8-7 |
| Bore | 86 mm |
| Stroke | 72.45 mm |
| Engine oil capacity | 7.9 qt (7.5 l) |
Performance
| Power | 129 hp (95 kW) @ 5500 rpm |
|---|---|
| Torque | 145 lb-ft (196 Nm) @ 3500 rpm |
| 0–62 mph (0–100 km/h) | 11.9 s |
| Top speed | 115 mph (185 km/h) |
Fuel economy and emissions
| Fuel | Gasoline |
|---|---|
| City | 14 mpg (16.4 l/100 km) |
| Fuel tank | 18.5 gal (70 l) |
Body, dimensions and weight
| Body style | Station wagon |
|---|---|
| Doors | 5 |
| Length | 186.0 in (4,725 mm) |
| Width | 70.3 in (1,786 mm) |
| Height | 57.9 in (1,470 mm) |
| Curb weight | 3,329 lb (1,510 kg) |
| Gross vehicle weight | 4,696 lb (2,130 kg) |
Drivetrain and chassis
| Drive | Rear-wheel drive |
|---|---|
| Gears | 4 |
| Steering | Hydraulic power steering |
| Front suspension | Double wishbone |
| Rear suspension | Trailing arm |
| Tires | Front wheel tires: 195/70 R14\; Rear wheel tires: 195/70 R14 |
| Wheels | Front wheel rims: 6J x 14\; Rear wheel rims: 6J x 14 |
What to check on a Mercedes-Benz W123 with this engine
- On a gasoline engine, check the oil consumption, the timing chain or belt and, on turbo engines, the turbocharger.
- Test the clutch or the automatic transmission from a cold start and in the low gears.
- Compare the odometer with the readings in the service records and in the VIN history report: a big gap means the mileage was rolled back.
Other Mercedes-Benz S123 engines
| Engine | Fuel | Power | Combined |
|---|---|---|---|
| 240 T D (65 hp) | Diesel | 65 hp (48 kW) | |
| 300 TD (80 hp) | Diesel | 80 hp (59 kW) | |
| 230 T (109 hp) | Gasoline | 109 hp (80 kW) | |
| 240 TD (72 hp) 4MT | Diesel | 72 hp (53 kW) | |
| 280 TE (185 hp) | Gasoline | 185 hp (136 kW) | |
| 230 TE (136 hp) | Gasoline | 136 hp (100 kW) | |
| 250 T (140 hp) | Gasoline | 140 hp (103 kW) | |
| 300 TD (88 hp) 4MT | Diesel | 88 hp (65 kW) | |
| 300 TD Turbodiesel (125 hp) Automatic | Diesel | 125 hp (92 kW) | |
| 200 T (101 hp) | Gasoline | 101 hp (74 kW) | |
| 200 T (109 hp) | Gasoline | 109 hp (80 kW) |