Maksym Medvid

Hello Everyone,

I'm a new Mercedes owner and have been enjoying the car so far. I've done some electrical aesthetic modifications to the car. Before I go straight to the problem, I'll provide the list of mods that I first installed. I also attached links to each mod that I mentioned. Tonight I'll recharge the battery and see if I can replicate the issue and film the issue when it occurs.

Mods;
- Dash Cam Front & Rear (Hardwired to driver side fusebox)
- RGB DRL Lights (Hardwired to the main fusebox under the hood) (Ignition accessory fuse)

The Problem;
The issue came 3 months after I installed the RGB DRL lights. When I would turn off the car and lock, after about 10 minutes the DRL and star lights would turn on for about 40 minutes then shut-off. That has continued for about a week until one night it would not turn off leaving me a dead battery in the morning. I removed the DRL lights from the fusebox to see if the car would still drain the battery at night. It drained the battery two more times until the car stopped turning on the star when it was off and locked.

Solutions;
I have two solutions that I can do myself but I don't prefer.
1.) Connect the DRL lights to the battery directly (I hate this option as I have to manually turn off/on the lights every time I get in/out of the car.)
2.) Buy a second battery and connect to the alternator just like the cop cars have. (Complicated/expensive option, and so far no clue how to have the alternator power another battery)
3.) Ask the smart people on the MB Forums to see if there are any other solutions to this issue. (This is so far my favorite option)

Thanks!

Plutoe

if you dont have a can bus scanner you are dealer bound as this is not a front yard DIY

Maksym Medvid

I went to the dealer, they just want money. They didn't fix the problem. They just said, remove your mods and replaced the battery. That's not helpful if I want the problem fixed so the car doesn't drain and I keep my mods. I just have the FIX'd scanner but I bet that isn't sufficient.

Elvisfan0108

You modified the car. The dealer is not going to try to fix something that may have been caused by the mods. Your best bet is to find an independent who is willing to look at it.

shan16

When fuse did you tap into in the driver side? You can use the glove box fuse

benzdude

This is the weirdest story ever.

• You don't tap "a fuse box", you tap a specific fuse. Which ones did you use?
• There are plenty of fuses you should NOT tap. *Danger*
• There are fuses that only provide power only when the car is ON.
• There are fuses that only provide power 24/7.

Use one of the 12 volt cigarette lighter socket fuses instead. They only have power when the car is ON.

Things don't just turn on for no reason. You must've tapped the wrong fuse.

If the issue didn't stop after you removed the RGB DRL lights, then remove the other mods and check.