What is the difference between Mercedes-Benz 350 and 400?

[NathanRose]

Mercedes-Benz 350 and 400 represent different displacement models of the same Mercedes-Benz series (taking the Mercedes-Benz SL model as an example): Mercedes-Benz SL350: Equipped with a 3.8L V6 engine, the transmission is an electronically controlled 6-speed manual gearbox with steering wheel shift buttons. Displacement (ml) 3724, maximum power (kw) 180/5750, maximum torque (N.m) 350/3000-4500. Mercedes-Benz SL400: 3.0-liter twin-turbocharged direct-injection V6 gasoline engine, the peak horsepower and torque output of the SL400 reach 328bhp and 480N.m respectively.

[McTessa]

I previously drove a Mercedes-Benz S350, and compared to the S400, the differences are significant. In terms of the engine, the 350 is equipped with a 2.0-liter four-cylinder engine producing 299 horsepower, making it suitable for daily commuting with better fuel efficiency. The 400 upgrades to a 3.0-liter inline-six engine with 362 horsepower, offering faster acceleration and easier overtaking. In terms of fuel consumption, the 350 is more economical, averaging 6-8L/100km in the city, while the 400 averages around 7-9L. The configurations also differ, with the 400 featuring standard advanced driver assistance systems like adaptive cruise control and better seat ventilation, whereas these are optional for the 350, with a price difference of about 100,000 yuan. Maintenance costs are similar, but the 400 has more responsive acceleration. On long-distance drives, the 400 feels more stable with less vibration, especially excelling on mountainous roads. Overall, the 350 is practical and economical, while the 400 is better suited for those pursuing performance. The choice depends on individual driving habits and budget.

[LeZoey]

From a technical perspective, the core difference between the Mercedes 350 and 400 lies in their engines. The 350 typically features a 2.0T four-cylinder engine delivering 299 horsepower and 400Nm torque, while the 400 upgrades to a 3.0T inline-six with 362 horsepower and 500Nm torque for stronger performance, reducing 0-100km/h acceleration by 0.5 seconds. Fuel consumption comparison: the 350 averages 8.5L combined, while the 400 is around 9L, with minimal difference on highways. The 400 boasts advanced MBUX system with voice control and standard air suspension, whereas the 350 only has basic features. Performance tests show the 400 has more stable braking and improved NVH noise control, especially in sport mode. Price-wise, the 400 is 20% more expensive but offers smoother overall driving experience. For long-distance comfort and tech features, the 400 excels; for daily commuting, the 350 provides sufficient convenience.

[SanJayce]

The differences between the Mercedes 350 and 400 are quite significant. In terms of practicality, the 350's power is sufficient for daily use, with 299 horsepower and lower fuel consumption, making it suitable for city driving. The 400 is upgraded to 362 horsepower, offering faster acceleration but slightly higher fuel consumption and a price that is about 10% more expensive. In terms of configuration, the 400 comes standard with heated and ventilated seats and has slightly larger trunk space. Maintenance costs are similar, but insurance for the 400 is slightly higher. It is recommended to prioritize the 350 if you have a tight budget and mainly commute, as it is more fuel-efficient for suburban driving. During test drives, the 400 shows more responsive acceleration, especially when climbing hills, making it less strenuous. Choosing a car should be based on personal needs rather than blindly following trends.

[DiValerie]

When choosing between the Mercedes 350 and 400, the salesperson explained that the 350 is the entry-level model with 300 horsepower, offering better fuel efficiency and comfort. The 400, on the other hand, boasts enhanced performance with 360 horsepower, quicker acceleration, and higher-end features like a HUD display. The 400 is about 15% more expensive, with minimal difference in city fuel consumption (8L vs 9L in real-world tests) and negligible variance on highways. Maintenance is easier for the 350 due to more readily available parts and slightly lower costs. I ultimately chose the 350 because it meets my commuting needs with great value for money. During test drives, the difference was noticeable—the 400 felt more stable and offered more driving fun, but the 350 was sufficient and more beginner-friendly.

[Lyla]

For tuning enthusiasts, the 350 and 400 have different foundations. The 350 engine has limited potential, with minor improvements from ECU upgrades. The 400's inline-six engine easily reaches 400 horsepower, with a 30% increase in torque, faster response, and better heat dissipation. The aftermarket support is strong—for example, exhaust modifications on the 400 deliver noticeable results and a fuller sound. Fuel consumption may rise to around 10L, but the driving experience soars, with smooth high-speed overtaking and ample room for personalization. The 350 suits basic models, while the 400 is the starting point for those pursuing performance potential.