Dash Camera Power Adapter (4-Pin) for Mercedes Benz - LED Display USB

In this review of the Dash Camera Power Adapter for Mercedes Benz, the bottom line is simple: this adapter is aimed at drivers who want a clean, hardwired power solution for dash cams without modifying the vehicle warranty. It is particularly useful for Mercedes owners who confirm a 4-pin rain sensor connector and want both 5V USB power and 12V DC outputs in a single plug-and-play harness. The single biggest reason to buy is the combination of an LED display for real-time current and voltage readout and multiple output cables that handle common dash cam power needs.

Key Features

• 4-pin Mercedes fit: Designed for Mercedes Benz vehicles with a 4-pin rain sensor connector so the installer can use the existing harness without splicing wires.
• Dual voltage output: Provides 5V via USB and 12V via DC plugs from a 12V input, allowing simultaneous power to both USB-based and 12V dash cam models.
• Six output cable types: Ships with DC 3.5mm A, DC 3.5mm B, RJ11, Micro USB, USB-C, and Mini USB to cover a wide range of dash cam and radar units without extra purchases.
• LED display for monitoring: The built-in LED screen shows current and voltage so the user can confirm the adapter is supplying stable power and diagnose wiring issues.
• Plug-and-play installation: Uses a special wiring harness connection that plugs into the rain sensor area, intended to keep factory wiring intact and not void the vehicle warranty.

Who It's For

This adapter is best for Mercedes Benz owners who have located a 4-pin rain sensor connector and want a tidy, factory-friendly hardwire option for one or two dash cams. It suits DIY installers who prefer a plug-in harness over splicing and anyone who values the LED readout for peace of mind during installation.

It is not the right choice for owners whose vehicles do not use a 4-pin rain sensor connector or for those who need a solution that provides voltages other than 5V and 12V. Also, buyers who require an installation service should check compatibility with their installer before purchase.

Pros & Cons

Pros

• Includes six common output cables so most dash cams and radar units can be powered without extra adapters.
• LED display provides live voltage and current information that helps with troubleshooting and verification.
• Plug-and-play harness is designed to install without voiding the vehicle warranty and keeps wiring neat behind the windshield sensor cover.

Cons

• Only compatible with Mercedes vehicles that use a 4-pin rain sensor connector, which must be confirmed before purchase.

Specifications

Brand	FitDVR
Vehicle compatibility	Mercedes Benz with 4-pin rain sensor connector
Input voltage	12V
Output voltages	5V (USB) and 12V (DC 3.5mm)
Included output cables	DC 3.5mm A, DC 3.5mm B, RJ11, Micro USB, USB-C, Mini USB
Display	LED screen showing current and voltage

Our Verdict

The Dash Camera Power Adapter for Mercedes Benz is a practical, value-minded hardwire option for owners who confirm a 4-pin rain sensor connection and want reliable 5V and 12V outputs without altering factory wiring. Its included cable assortment and LED monitoring make it a convenient choice for powering one or two dash cams while keeping wiring tidy and preserving the vehicle warranty.

Frequently Asked Questions

Do I need a 4-pin connector to use this adapter?
Yes, you must confirm a 4-pin rain sensor connector on your Mercedes before purchasing; the product is designed for that specific plug type.

What voltages does the adapter provide?
The adapter accepts 12V input and supplies 5V via USB outputs and 12V via DC 3.5mm outputs.

Will installation void my vehicle warranty?
The adapter uses a plug-and-play wiring harness intended not to void the vehicle warranty and is designed to avoid affecting the rain sensor.