Mercedes-Benz generally does not offer a lifetime warranty for material defects on vehicles, including for the steering wheel or other interior materials like leather and Alcantara. However, Mercedes-Benz does provide a limited warranty for certain components of the vehicle, and this warranty can vary depending on the region, model, and specific terms.

Mercedes-Benz Warranty Overview:

1. New Vehicle Limited Warranty: Mercedes-Benz typically offers a 4-year/50,000-mile (80,000 km) limited warranty for new vehicles in the United States. This covers material defects and workmanship issues that arise during the warranty period. However, wear and tear items, like upholstery, leather, Alcantara, and other interior surfaces, are generally excluded from full coverage.
2. Corrosion and Paint Warranty: Mercedes-Benz offers a limited corrosion warranty (usually 6 years or longer in some cases) that covers issues like rust or paint defects on the vehicle's body. This is distinct from the warranty on interior materials like the steering wheel.
3. Extended Warranty Options: Mercedes-Benz offers extended warranties that can be purchased for additional coverage beyond the standard 4-year/50,000-mile period. These warranties may provide protection for various components, but they often do not extend to cosmetic materials such as leather or Alcantara.
4. Material Defects Coverage: In terms of interior materials, like leather and Alcantara, Mercedes-Benz offers a warranty for manufacturing defects in the materials themselves, typically within the initial 4-year/50,000-mile period. For example, if the leather or Alcantara begins to peel, crack, or shows defects in workmanship, it may be covered under the standard warranty. However, damage due to wear and tear, misuse, or environmental exposure (such as UV fading) is generally not covered.
5. Service and Maintenance: Regular maintenance and proper care of the vehicle's interior materials, including the steering wheel, is recommended to maintain the quality of the surfaces. While a warranty may not cover wear and tear, a well-maintained interior can prolong the lifespan of materials like leather and Alcantara.

Conclusion:

Mercedes-Benz does not offer a lifetime warranty for material defects, especially for items like steering wheels or interior materials such as leather and Alcantara. The standard limited warranty typically covers material defects for 4 years/50,000 miles, but wear and tear or damage due to environmental factors are excluded. It is advisable to check specific warranty details for your region and model to understand the full coverage for material defects.