Understanding the correct wheel size for your 2008 Mercedes-Benz R320 CDI is crucial for maintaining its performance, safety, and aesthetics. Whether you’re looking to replace worn tires, upgrade your wheels, or simply understand your vehicle’s specifications, this guide provides all the essential information about the 2008 Mercedes R320 Cdi Wheel Size.
This article delves into the specific wheel and tire specifications for the 2008 Mercedes-Benz R-Class W251 Facelift, focusing on the popular R320 CDI diesel model. We’ll cover original equipment (OE) sizes, alternative options, and key parameters like bolt pattern, offset, and more, ensuring you have a comprehensive understanding for making informed decisions.
Decoding 2008 Mercedes R320 CDI Wheel Fitment
Finding the right wheel and tire combination for your 2008 Mercedes R320 CDI involves more than just matching diameters. It requires understanding various measurements and specifications to ensure proper fitment and optimal performance. This section breaks down the details for the Mercedes-Benz R-Class W251 Facelift produced between 2007 and 2010, with a specific focus on the 2008 models.
The 2008 Mercedes-Benz R-Class W251 Facelift MPV offered several modifications, including diesel variants like the R 320 CDI. Let’s explore the wheel sizes for these models.
Original Equipment (OE) Wheel and Tire Sizes for 2008 Mercedes R320 CDI
Mercedes-Benz specifies particular wheel and tire sizes as original equipment for the 2008 R320 CDI to guarantee the vehicle’s intended handling and safety characteristics. These OE specifications are a reliable starting point when considering replacements or upgrades.
For the 2008 Mercedes-Benz R-Class W251 Facelift R 320 CDI models, there are slight regional variations in OE specifications. Below are the details for different sales regions:
2008 Mercedes-Benz R-Class R 320 CDI (221 hp) – USDM, CDM (USA+, Canada)
This modification of the R320 CDI, designed for the US and Canadian markets, has the following recommended wheel and tire sizes:
| Tire | Rim | Offset Range mm | Backspacing mm (inches) | Tire Weight kg (lb) | Tire Pressure (front/rear) bar (psi) | Notes |
|---|---|---|---|---|---|---|
| OE | 54 – 58 | 164 (6.46) | 12.5 (27.5) | 2.0/2.2 (29/32) | OE | |
| OE | 65 – 69 | 181 (7.13) | 13.2 (29.1) | 2.0/2.2 (29/32) | OE | |
| 181 (7.13) | 13.1 (28.8) | 2.2/2.4 (32/35) | ||||
| 185-197 (7.28-7.76) | 13.1-14.4 (28.8-31.7) | 2.2/2.4 (32/35) | ||||
| 182 (7.17) | 13.5 (29.8) | 2.2/2.4 (32/35) | ||||
| 187 (7.36) | 13.5 (29.8) | 2.2/2.4 (32/35) |
2008 Mercedes-Benz R-Class R 320 CDI (221 hp) – EUDM, RUS (Europe, Russia+)
For the European and Russian markets, the 2008 Mercedes-Benz R-Class R 320 CDI with 221 hp has slightly different OE options:
| Tire | Rim | Offset Range mm | Backspacing mm (inches) | Tire Weight kg (lb) | Tire Pressure (front/rear) bar (psi) | Notes |
|---|---|---|---|---|---|---|
| OE | 54 – 58 | 164 (6.46) | 12.5 (27.5) | 2.0/2.2 (29/32) | OE | |
| OE | 65 – 69 | 181 (7.13) | 13.2 (29.1) | 2.0/2.2 (29/32) | OE | |
| 181 (7.13) | 13.1 (28.8) | 2.2/2.4 (32/35) | ||||
| 185-197 (7.28-7.76) | 13.1-14.4 (28.8-31.7) | 2.2/2.4 (32/35) | ||||
| 182 (7.17) | 13.5 (29.8) | 2.2/2.4 (32/35) | ||||
| 187 (7.36) | 13.5 (29.8) | 2.2/2.4 (32/35) |
Note: The original article lists tire specifications without explicitly stating rim sizes for some entries. For clarity, when selecting new wheels and tires, ensure all specifications are compatible.
Understanding Key Wheel Fitment Parameters
To properly select wheels for your 2008 Mercedes R320 CDI, it’s essential to understand these key parameters:
- Bolt Pattern (PCD): This is the diameter of the circle formed by the wheel bolts. While the specific PCD for the 2008 Mercedes R320 CDI is not explicitly provided in the article, it is a crucial specification to verify for compatibility. Further research may be needed to specify the exact PCD.
- Center Bore / Hub Bore: This is the diameter of the center hole in the wheel that centers it on the vehicle’s hub. The article indicates “unknown” for the center bore, but it is generally vehicle-specific and important for proper wheel mounting and vibration prevention. Further research to find the exact center bore is recommended for a more complete guide.
- Offset: Wheel offset is the distance between the wheel’s centerline and its mounting surface. It’s measured in millimeters and can be positive, negative, or zero. The tables above provide “Offset Range mm,” indicating acceptable offset ranges for different wheel and tire configurations.
- Wheel Fasteners: The 2008 Mercedes R320 CDI uses “Lug bolts” to secure the wheels.
- Thread Size & Wheel Tightening Torque: The thread size and tightening torque are also listed as “unknown” in the original data. These are critical for safe wheel installation. It is important to consult a reliable source or mechanic for the correct thread size and wheel tightening torque for the 2008 Mercedes R320 CDI.
Choosing Aftermarket Wheels for Your 2008 Mercedes R320 CDI
When considering aftermarket wheels for your 2008 Mercedes R320 CDI, ensure they meet or exceed the specifications of the original equipment. Pay close attention to:
- Size: Adhere to the recommended rim diameters (17″, 18″, 19″, 20″) and widths as listed in the tables.
- Load Rating & Speed Rating: Ensure that both tires and wheels have appropriate load and speed ratings for your vehicle and driving conditions.
- Compatibility: Double-check bolt pattern, center bore (if you can find this information), and offset to guarantee proper fitment without modifications or spacers (unless intentionally used and correctly specified).
Conclusion
Selecting the correct wheel size for your 2008 Mercedes R320 CDI is vital for safety, performance, and the overall driving experience. This guide has compiled the essential data from the original source, highlighting the OE wheel and tire sizes and key fitment parameters.
While some specifications like bolt pattern, center bore, thread size, and tightening torque are listed as “unknown” in the source data, it’s crucial to obtain this information from reliable resources before making any wheel or tire changes. Always prioritize safety and consult with automotive professionals for accurate fitment advice. By understanding these details, you can confidently maintain or upgrade the wheels on your 2008 Mercedes-Benz R320 CDI.
