The ACC heating function in a vehicle's steering wheel is designed to provide consistent warmth, but over time, it can have some impact on the steering wheel's texture or material. This effect largely depends on the type of material used for the steering wheel and how the heating system operates. Here's a breakdown of how the heating function can influence the steering wheel over time:

1. Leather or Leather-Like Materials:

• Leather is a common material for luxury steering wheels, and it is often used in vehicles like the W465 G-Class. Leather can be affected by heat over time, especially if it is exposed to consistent heating.
  • Drying and Cracking: Prolonged use of the steering wheel heating may cause the leather to become drier. Leather naturally contains oils and moisture, and constant exposure to heat can cause these to evaporate, leading to the leather becoming brittle or cracked.
  • Fading and Discoloration: Over time, the constant heating may cause the color of the leather to fade or become uneven, especially if the wheel is exposed to direct sunlight or higher temperatures for extended periods.
  • Texture Changes: The surface of the leather may lose some of its softness and develop a slightly worn or rough texture. This could affect the tactile experience of the steering wheel over time, as it may feel less supple or smooth than when it was new.
• Maintenance: Regular maintenance and conditioning of leather can help mitigate these effects. Using specialized leather care products that restore moisture and flexibility can keep the material in better condition even with frequent use of the heating function.

2. Wood or Metal Trim:

• Some steering wheels may have accents made from wood, metal, or other premium materials. The ACC heating function generally has less direct impact on these materials, but long-term exposure to heat could still cause changes in appearance.
  • Wood: Prolonged heat exposure could cause wood to expand or contract slightly, potentially affecting the finish or causing the wood to develop cracks or a more distressed appearance over time.
  • Metal: If the steering wheel has metal components, these are generally more resilient to the effects of heat. However, if the wheel is exposed to heat frequently, it may affect the finish or cause it to lose its shine or patina.

3. Synthetic or Artificial Materials:

• Many modern steering wheels also feature synthetic or artificial leather, which is designed to mimic the look and feel of real leather but without the same natural properties. These materials are generally more resistant to the drying effects of heat, but they may still deteriorate over time with frequent exposure to high temperatures.
  • Surface Peeling: If the synthetic material isn't as durable, the surface could begin to peel or lose its finish.
  • Degradation: Depending on the specific synthetic material used, prolonged exposure to heat could cause some gradual breakdown or discoloration of the surface.

4. Comfort and Grip:

• While the ACC heating function is designed for comfort, the tactile experience of the steering wheel could change over time as the material reacts to heat. As the texture changes, the grip may feel less secure, especially if the wheel becomes drier or slicker with use.
• In some cases, the heating may cause a softening of certain materials, making the surface feel more squishy or less firm, which might not be ideal for drivers who prefer a more solid grip.

5. Impact on Durability:

• The durability of the steering wheel's material may be impacted by both the frequency of heating and the ambient temperature in which the vehicle is operated. In particularly cold climates, where the heating is used more often, the material may experience more noticeable wear.
• Additionally, if the vehicle is exposed to high ambient temperatures (e.g., hot climates or when parked in direct sunlight), the material may undergo more significant thermal expansion and shrinkage, potentially making the wheel more prone to cracking or warping over time.

6. Protective Coatings:

• Some steering wheels are treated with protective coatings to help preserve the material and prevent damage from heat. These coatings can reduce the risk of cracking, discoloration, and wear but may still experience some effects over time with frequent exposure to high temperatures.

7. Maintenance Tips:

• Regular Cleaning: Keeping the steering wheel clean and free of dust and grime can reduce friction that might wear down the material.
• Conditioning: If the wheel is made from leather or similar materials, applying conditioners designed for the specific material can help restore moisture and keep the texture smooth.
• Climate Control: If you're driving in areas with extreme temperatures, using the vehicle’s climate control system to regulate the cabin temperature and prevent excessive heat build-up in the steering wheel may help prolong the material's life.

Conclusion:

The ACC heating function can have a long-term effect on the texture and material of the steering wheel, especially with materials like leather, which may become drier, cracked, or discolored over time. Synthetic materials are generally more resistant but may still degrade with frequent heat exposure. Regular maintenance, such as conditioning and cleaning, can help maintain the steering wheel's appearance and texture despite regular use of the heating function. Additionally, certain premium materials like metal or wood might be less affected, though some aesthetic changes can still occur.