Originally Posted by DJPoop

Gonna bump this thread rather than create a new one on a topic that I'm sure has been covered many times in the past....

I have a couple week old '18 C63s coupe...not to digress but this car is the ****. I'm about 100 miles away from the 1,000 mile break in and I've been trying to go easy on it and keep her below 4k RPM....what a tease.

Ok, back to the point of this post...last night I hardwired the front dash cam from my old M4 (which was a breeze to hookup in that car since there's a 12v socket under the passenger foot well). No biggie on tapping a fuse in the Merc though since my weekend car is a '67 Bronco, so I'm used to wiring issues, let alone ripping the whole engine apart. Anyhoo...the German fuse diagram posted in this thread is no help at all. FYI, I just run a front dash cam for when I'm driving so I don't have an external battery. That said, I was trying to tap what I though was the glove box light (i.e., I wanted an intermittent fuse), but the "C-Klasse" German diagram obviously doesn't apply to my car. The pic below is where I plugged in my add-a-fuse, then grounded it to the metal bolts in the frame and ran the wires up through the trim.




The dash cam powered up fine so I figured all was good, and went inside to drink a beer. I came back about 20 minutes later and saw the dash cam was still powered up though, so obviously this fuse is constant, which I don't want since I don't have (and don't want to deal with installing) a Power Magic Pro box. I just want a basic dash cam that records when the car is on and shuts off when the car's off. So simple question....what freaking fuse do I tap into?

Second question. I'm also putting in my Uniden R3 from my M4, which I had powered through a Mirror Tap to an intermittent mirror light (maybe the compass?) in that car....where do I plug those terminals into in the Merc from the mirror/map light area if anyone knows?

Thanks folks!