Mercedes W166 Rear Axle Differential Diff 2,82 Ratio A1663502000 WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

Mercedes W166 Rear Axle Differential Diff 2,82 Ratio is an original drivetrain component designed for installation on the rear axle of Mercedes W166 series SUV vehicles. With a factory gear ratio of 2.82, it ensures stable torque distribution, predictable vehicle handling, and consistency with the factory drivetrain characteristics. This is the ideal solution for users who expect proven, OEM-standard differential performance without any structural modifications to the vehicle.

Specifications and technical data

• SKU: A1663502000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1663502000
• Substitutable numbers: A1663502000, A 166 350 20 00
• Location on the vehicle: Rear
• Category: Differentials

Technical specifications and 2.82 gear ratio

The presented differential belongs to the Differentials category, responsible for the precise transfer of power to the rear wheels. The 2.82 gear ratio is a typical choice for comfortable, road-oriented drivetrain configurations, where smooth acceleration, moderate engine RPM at highway speeds, and predictable drivetrain response are prioritized.

A rear axle with this gear ratio promotes:

• maintaining stable engine RPM when driving at constant speeds,
• balanced dynamics during overtaking,
• comfortable, smooth drivetrain performance in daily use.

Purpose and vehicle placement

The differential is designed for installation in the rear part of the vehicle, within the drive axle assembly. Its placement as a rear axle component means it is directly responsible for distributing torque between the rear wheels, influencing traction, acceleration stability, and vehicle behavior in corners.

For Mercedes W166 series SUVs, a correctly selected rear axle is crucial for:

• maintaining factory performance of traction and stability control systems,
• proper cooperation with the automatic transmission,
• maintaining predictable handling on both dry and slippery surfaces.

Benefits of using an original differential

Using an original differential in a Mercedes W166 helps avoid problems typical of aftermarket replacements of uncertain origin. The factory design ensures:

• compatibility with factory drivetrain electronics settings,
• proper fitment with mounts and half-shafts,
• no need for structural modifications during installation.

For workshops and users, this means shorter installation time, lower risk of improper system operation, and easier diagnostics in the future. A used rear axle is a great solution for post-accident repairs, replacing a worn-out differential, or restoring a vehicle to its stock specification after previous modifications.

Gear ratio selection and drivetrain compatibility

When replacing a differential in a Mercedes W166, it is crucial to ensure the gear ratio is compatible with the rest of the drivetrain components. The 2.82 ratio affects:

• acceleration characteristics across the entire speed range,
• engine RPM during highway driving,
• the operation of traction and stability support systems.

To better understand how to choose a drive axle and differential for your driving style and vehicle configuration, it is worth checking out our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style. The article discusses definitions, gear ratios, compatibility issues, and practical examples of using salvaged parts.

Application area and drivetrain expansion

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and need other components from the same group, such as additional axles, differentials with different ratios, or compatible rear-drive sub-assemblies, check out the available parts in the Mercedes Differentials category.

For those considering performance modifications using secondary market components, tips on safe tuning with used parts, described in the article, may also be useful: Tuning with used parts – how to gain performance without spending a fortune.

Summary

Mercedes W166 Rear Axle Differential Diff 2,82 Ratio is a practical solution for users and workshops looking to restore proper rear-wheel drive performance in Mercedes W166 series vehicles. With a properly selected gear ratio, factory design, and specific rear-axle application, this component allows you to maintain stock handling characteristics, stability, and driving comfort while reducing repair costs by using a high-quality pre-owned component.