The Mercedes-benz Slk class is renowned for its sporty performance and luxurious design, offering a thrilling roadster experience in a compact package. This article delves into the technical specifications of several key models within the SLK lineup, specifically the SLK300, SLK350, and the high-performance AMG SLK55. We will explore the engine, performance, dimensions, and various mechanical aspects that define these distinct versions of the mercedes-benz slk.
Chassis and Vehicle Type
All models discussed here share the fundamental characteristics of a 2-door, 2-passenger roadster configuration. This design emphasizes open-top driving enjoyment and a sporty aesthetic. Underneath the sleek exterior, each SLK variant is built upon a robust steel unibody chassis. This construction method provides a strong and rigid foundation, crucial for both safety and handling dynamics in a performance-oriented vehicle like the mercedes-benz slk.
Engine Specifications: Powering the Mercedes-Benz SLK Range
The heart of any car lies in its engine, and the Mercedes-Benz SLK offers a range of powertrains to suit different driving preferences and performance expectations. Let’s examine the engine specifics for each model:
SLK300 Engine Details
The SLK300 is equipped with a sophisticated 2.0-liter inline 4-cylinder engine. This modern engine utilizes an aluminum engine block and alloy cylinder head, contributing to weight reduction and improved thermal efficiency. Featuring a 4-valve per cylinder arrangement, it optimizes airflow for enhanced performance. The engine is turbocharged and incorporates direct injection, technologies that boost power and efficiency. This configuration allows the SLK300 to produce 241 horsepower at 5,500 rpm and a substantial 278 lb-ft of torque available across a wide rev range from 1,200 to 4,000 rpm. The compression ratio is set at 9.8 : 1.
SLK350 Engine Highlights
Stepping up in performance, the SLK350 boasts a more powerful 3.5-liter V6 engine. Similar to the SLK300, it also features an aluminum engine block and alloy cylinder head, along with 4 valves per cylinder. This naturally aspirated engine uses direct-injection for precise fuel delivery. The larger displacement and V6 configuration result in a higher output of 302 horsepower at 6,500 rpm. Torque figures remain at 278 lb-ft, but are delivered in a slightly higher band from 3,500 to 5,250 rpm. The SLK350 has a higher compression ratio of 12.0 : 1, indicative of its performance-oriented design, and a maximum engine speed reaching 7,000 rpm.
AMG SLK55 Engine Power
For ultimate performance within the SLK range, the AMG SLK55 is fitted with a formidable 5.5-liter AMG V8 engine. Staying consistent with the other models, it uses an aluminum engine block and alloy cylinder head, and maintains a 4-valve per cylinder arrangement. This high-performance V8 also features direct-injection. The AMG-tuned engine delivers a significant jump in power, producing 415 horsepower at 6,800 rpm and a massive 398 lb-ft of torque at 4,500 rpm. The compression ratio is 12.6 : 1, and the engine can reach a maximum speed of 7,200 rpm, showcasing its racing pedigree.
Performance Metrics: Acceleration and Fuel Economy
The engine specifications directly translate into the performance characteristics of each mercedes-benz slk model. Let’s compare their acceleration, top speed, and fuel economy:
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| 0-60 mph (sec.) | 5.8 | 5.4 | 4.5 |
| Top Speed (mph) | 155 | 155 | 155 (174*) |
| Fuel Economy (City/Hwy/Comb. mpg) | 25/32/28 | 21/29/24 | 19/28/22 |
*174mph with AMG Development Package
As evident from the table, the AMG SLK55 leads in acceleration, reaching 60 mph in just 4.5 seconds. The SLK350 is slightly quicker than the SLK300, reflecting its more powerful V6 engine. All models have an electronically limited top speed of 155 mph, with the AMG SLK55 capable of reaching 174 mph with the optional AMG Development Package. Fuel economy understandably varies, with the SLK300 offering the best figures due to its smaller, turbocharged engine, while the AMG SLK55, with its V8, has the lowest fuel economy.
Transmission Systems: Gearboxes for Different Driving Styles
The transmission plays a crucial role in delivering engine power to the wheels and influencing the driving experience. Each mercedes-benz slk model utilizes a different automatic transmission, tailored to its performance level and engine characteristics.
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| Type | 9G-TRONIC | 7G-TRONIC PLUS | AMG SPEEDSHIFT 7G- TRONIC PLUS |
The SLK300 features the advanced 9G-TRONIC 9-speed automatic transmission, providing smooth and efficient gear changes. The SLK350 is equipped with the 7G-TRONIC PLUS 7-speed automatic transmission, known for its responsiveness and refined operation. The AMG SLK55 utilizes the AMG SPEEDSHIFT 7G-TRONIC PLUS, a performance-oriented version of the 7-speed transmission, tuned for faster shifts and enhanced driver engagement.
Suspension, Tires, and Brakes: Handling and Stopping Power
While specific details on suspension and brake designs are not provided in the original technical data, we can note the tire and wheel specifications, which are important for handling and road grip:
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| Standard Tire | High-Performance | High-Performance | High-Performance |
| Front Tire Size | 225/45 R17 | 225/40 R18 | 225/40 R18 |
| Rear Tire Size | 245/40 R17 | 245/35 R18 | 245/35 R18 |
| Front Wheel | 7.5J X 17 | 7.5J X 17 | 7.5J X 18 |
| Rear Wheel | 8.5J X 17 | 8.5J X 17 | 9J X 18 |
All models are equipped with high-performance tires, emphasizing their sporty nature. The SLK350 and AMG SLK55 feature larger 18-inch wheels compared to the SLK300’s 17-inch wheels, potentially offering enhanced handling and aesthetics. The AMG SLK55 also has wider rear wheels (9J) for improved traction.
Exterior and Interior Dimensions: Size and Space
The mercedes-benz slk maintains a compact footprint while offering reasonable interior space for a roadster. Let’s examine the key dimensions:
Exterior Dimensions (inches)
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| Wheelbase | 95.7 | 95.7 | 95.7 |
| Length | 162.8 | 162.8 | 163.2 |
| Width (incl. mirrors) | 79.0 | 79.0 | 79.0 |
| Height | 51.2 | 51.2 | 51.2 |
| Track width front | 61.4 | 61.4 | 61.0 |
| Track width rear | 61.6 | 61.6 | 61.7 |
Interior Dimensions (inches)
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| Headroom (top up) | 38.0 / 39.1 w/ Pano or MAGIC SKY | 38.0 / 39.1 w/ Pano or MAGIC SKY | 38.0 / 39.1 w/Pano or MAGIC SKY |
| Leg room | 42.5 | 42.5 | 42.5 |
| Shoulder room | 52.2 | 52.2 | 52.2 |
The exterior dimensions are largely consistent across the models, with minor variations. Interior space, particularly legroom and shoulder room, remains the same for all variants, offering comfortable accommodation for two occupants. Headroom can slightly increase with the optional panoramic roof or MAGIC SKY CONTROL.
Capacities: Trunk Space, Weight, and Fuel Tank
Practical aspects such as trunk capacity, curb weight, and fuel tank size are also important considerations.
| SLK300 | SLK350 | AMG SLK55 | |
|---|---|---|---|
| Trunk Capacity (roof up/down) (cu.ft.) | 10.1/6.4 | 10.1/6.4 | 10.1/6.4 |
| Curb weight (lbs.) | 3,417 | 3,417 | 3,583 |
| Fuel tank (gallons) | 15.9 | 15.9 | 18.5 |
Trunk capacity is identical across all models, offering a reasonable 10.1 cubic feet with the roof up and 6.4 cubic feet with the roof retracted. The AMG SLK55 is slightly heavier than the SLK300 and SLK350, likely due to its larger engine and performance-oriented components. The AMG model also features a larger fuel tank capacity.
Conclusion: Choosing the Right Mercedes-Benz SLK
This detailed look at the technical specifications reveals the distinct character of each mercedes-benz slk model. The SLK300 offers a balanced blend of performance and efficiency with its turbocharged 4-cylinder engine. The SLK350 steps up the performance with a smooth and powerful V6. For driving enthusiasts seeking maximum thrill, the AMG SLK55 delivers exhilarating performance with its potent V8 engine. Understanding these technical nuances allows potential buyers and enthusiasts to appreciate the engineering behind the mercedes-benz slk and choose the model that best fits their needs and preferences.
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