FitDVR Dash Camera Power Adapter for Mercedes-Benz

The FitDVR Dash Camera Power Adapter (3-Pin) is a plug-and-play power module that provides both 5V USB and 12V DC outputs for Mercedes‑Benz vehicles with a 3‑pin rain sensor connector, featuring an LED display for voltage and current.

This adapter is designed to integrate with Mercedes‑Benz wiring harnesses that use a three‑pin rain sensor plug, delivering stable power to dash cams, radar detectors, and other accessories without cutting vehicle wires or voiding warranties. It includes multiple output cables to match popular dash cam power jacks and an LED readout so you can monitor voltage and current in real time. The unit is compact, uses a special wiring harness for a clean install, and ships with five different adapter cables to cover most devices.

How does the adapter connect to my Mercedes-Benz?

The FitDVR model plugs into the car’s existing 3‑pin rain sensor connector via a dedicated wiring harness — no permanent splicing required. This keeps the vehicle wiring intact and preserves factory features while supplying accessory power.

• Compatible with Mercedes 3‑pin rain sensor sockets — verify connector before purchasing.
• Plug-and-play wiring harness for an easy, reversible install.
• Does not interfere with the rain sensor or factory systems when installed correctly.

What power outputs and cable options are provided?

The adapter accepts 12V input from the car and provides two voltage outputs: 12V through DC leads for devices that require vehicle voltage, and 5V via USB ports for most dash cameras and USB accessories. It ships with a set of six commonly used output cables so you can connect a wide range of devices immediately.

• 5V outputs: Micro‑USB, USB‑C, and Mini‑USB for USB‑powered dash cams.
• 12V outputs: Two different 3.5mm DC plugs and an RJ11 lead for hardwired camera models.
• LED screen shows live voltage and current for quick diagnostics.

Will this installation affect my vehicle’s warranty or rain sensor?

The FitDVR uses a non‑destructive harness connection so you do not have to cut factory wiring or alter the sensor. When fitted as instructed, it preserves factory integrity and should not void Mercedes warranty coverage. Always confirm compatibility and consult dealer policy if in doubt.

• Non-invasive harness keeps original connectors intact.
• Designed to avoid interference with rain sensor operation.
• Installation video guidance included to help locate and access the rain sensor connector.

How does the LED display help me manage my dash cam setup?

The built‑in LED display provides an immediate readout of the adapter’s output voltage and current draw, making it easier to spot power issues and confirm correct operation. This helps you ensure your dash cam or radar detector is receiving the right voltage and can indicate if a cable or device is drawing excessive current.

• Shows live voltage to confirm stable 5V or 12V output.
• Displays current draw to detect abnormal consumption quickly.
• Small, bright display visible during installation and troubleshooting.

Who is this for: The FitDVR Dash Camera Power Adapter (3‑Pin) is intended for Mercedes‑Benz owners who want a clean, reversible hardwire solution for dash cams or radar units without splicing factory wiring. It’s particularly useful for technicians, installers, and DIY drivers who need multi‑voltage outputs, several cable types, and an LED readout for diagnostics. If your vehicle has a 3‑pin rain sensor connector and you want a tidy, warranty‑friendly installation with flexible connector options, this adapter is a practical choice.