1. Starters, Alternators, ECUs & Wiring Offers
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  3. CLASSIC INDUSTRIES W20310

CLASSIC INDUSTRIES W20310 Mount Battery Switch Fused Bypass

W20310 Classic Industries Side Mount Battery Switch With Fused Bypass

( Brand: Classic Industries ), ( Part Type: Switch Mount Battery ), ( Manufacturer Part Number: W20310 )

Review CLASSIC INDUSTRIES Side Mount Battery Switch Fused Bypass

Introducing the Classic W20310 Mount Battery Switch Fused Bypass, a must-have component for ensuring a reliable and safe electrical system in your vehicle. This battery switch is designed to replace the original factory switch in older model cars, providing additional features and flexibility.

The W20310 battery switch is mounted on the dashboard or under the hood, allowing easy access to the ignition and battery power sources. Its robust construction is built to withstand the rigors of daily use, ensuring long-lasting performance.

One of the key features of this battery switch is the integrated fused bypass. This allows the user to bypass the factory-installed fuses and connect accessories directly to the battery, without the need for additional wiring or fuse boxes. The switch includes six fused outputs, each with a 10A rating, providing ample power for various accessories.

The switch also includes a convenient ignition-controlled output, which allows the user to power accessories only when the ignition is on. This feature helps to prevent draining the battery when the vehicle is not in use.

The Classic W20310 battery switch is designed to be a direct replacement for the factory switch, making installation simple and straightforward. It uses the same wiring connections as the original switch, requiring no modifications to the vehicle's wiring harness.

In summary, the Classic W20310 Mount Battery Switch Fused Bypass is an essential upgrade for any vehicle owner looking to add power accessories while maintaining a safe and reliable electrical system. Its durable construction, integrated fused bypass, and convenient ignition-controlled output make it a top choice for both DIY enthusiasts and professional installers.

Buying a classic W203 10-mount battery switch with a fused bypass involves replacing the original battery switch in your Mercedes-Benz vehicle with a new one that includes an integrated fused bypass. Here are some pros and cons to help you make an informed decision:

Pros:

1. Convenience: A fused battery switch bypass eliminates the need for an additional fuse box and wiring for an auxiliary battery.

2. Enhanced reliability: The integrated fuse provides better protection against electrical surges and short circuits.

3. Improved safety: A fused battery switch helps prevent the risk of a fire caused by an overcharged or undercharged battery.

4. Easy installation: Most aftermarket battery switches with a fused bypass are designed for easy installation, making it a DIY-friendly project.

Cons:

1. Cost: A fused battery switch with a bypass may cost more than a standard battery switch or a separate fuse box and wiring for an auxiliary battery.

2. Compatibility: Ensure that the aftermarket battery switch is compatible with your specific Mercedes-Benz model and year before making a purchase.

3. Complexity: Although the installation process is relatively simple, it may require some electrical knowledge and experience.

Conclusion:

A classic W203 10-mount battery switch with a fused bypass can offer several advantages, including convenience, reliability, enhanced safety, and ease of installation. However, it may come with a higher cost and some compatibility and complexity considerations. If you value the benefits of a fused bypass and are confident in your electrical skills, then this upgrade could be a worthwhile investment for your Mercedes-Benz.

Recommendation:

If you decide to purchase a classic W203 10-mount battery switch with a fused bypass, ensure that you buy one from a reputable and trusted supplier. Research the product thoroughly, read customer reviews, and consult with a professional if needed to ensure a successful installation. Additionally, make sure to follow the installation instructions carefully to avoid any potential electrical issues.

part # w20310 price

  • $24.99

specifications wiringwench:

  • brand: Classic Industries
  • part type: Switch Mount Battery
  • manufacturer part number: W20310

shipping wiringwench:

  • carrier: USPS, UPS, FedEx
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  • transit: 4-10 Days
  • cost: $7.88
  • type: Calculated

offer wiringwench:

  • availability: In Stock
  • quantity: 6
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  • started: February 7, 2026
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  • condition: New
  • Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > Other Starters, Alternators, ECUs Wiring

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  • # reviews: 43760
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part type: switch mount battery,
category: auto parts > car truck parts accessories > starters, alternators, ecus wiring, sku: 11371704472449673,

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1 offer $24.99 USD
  • Offer #1: $24.99 price + $8.52 delivery = $33.51* total. The battery is disconnected and re-connected by turning the knob a few turns. Side mount battery switch is easy to install on the negative battery post and includes a fused bypass.+$8.52 shipping