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I am looking to install the Viofo A129 Duo into my parent's 2016 C300 and was going to hardwire using the Viofo 3-wire hardwiring kit (link here) and two fuse taps.
The car is not in my possession, so it is hard for me to confirm a few details at the moment. I have a few questions for anyone that has done this already:
1. What type of fuse does the C300 have? (My options to choose from are here . Click on the picture with all the fuse types)
2. Is there a fuse box in the drivers footwell or do I have to tap into the trunk?
3. Are there any issues with the car's on-off feature? Will I run into any problems since the car shuts off at a stop and starts back up again when I take off?
4. What voltage cutoff should I set it at? (11.8, 12.0, 12.2, or 12.4)
Thank you in advanced for any help!
Last edited by unrecognized88; Mar 17, 2020 at 03:08 PM.
I am looking to install the Viofo A129 Duo into my parent's 2016 C300 and was going to hardwire using the Viofo 3-wire hardwiring kit (link here) and two fuse taps.
The car is not in my possession, so it is hard for me to confirm a few details at the moment. I have a few questions for anyone that has done this already:
1. What type of fuse does the C300 have? (My options to choose from are here . Click on the picture with all the fuse types)
2. Is there a fuse box in the drivers footwell or do I have to tap into the trunk?
3. Are there any issues with the car's on-off feature? Will I run into any problems since the car shuts off at a stop and starts back up again when I take off?
4. What voltage cutoff should I set it at? (11.8, 12.0, 12.2, or 12.4)
Thank you in advanced for any help!
I installed a129duo on my c43. Used driver's fuse panel that's next to the wheel, not the footwell(which is on passenger side).
There are both ACC and BATT fuses there. As for the cutoff, I would go with 12.2v or 12.4v
I had some issues with my car battery with parking mode so I set it off. Now dashcam only comes on when I turn the car on.
I installed a129duo on my c43. Used driver's fuse panel that's next to the wheel, not the footwell(which is on passenger side).
There are both ACC and BATT fuses there. As for the cutoff, I would go with 12.2v or 12.4v
I had some issues with my car battery with parking mode so I set it off. Now dashcam only comes on when I turn the car on.
Awesome, I will look into the fuse pane on the driver's side then.
Any issues while you were driving? I'm not familiar with the C43 (or Mercedes overall), so does your car also turn off when you come to a red light/stop?
What issues did you have with the battery and parking mode?
wires to the end of the positive lead from the dashcam harness and it receives power as long as the car is in Accessory or Run mode.
The start/stop function does not affect it at all since this fuse remains powered when the car is in "stop" mode. If you shut the car off however, the power to the dashcam is switched off.
Since the Viofo also uses voltage detection/cutoff, you may have to set it as low as 11.8v if your battery drops that low when the car is in "stop" mode at a traffic light, etc. Start at the higher numbers and try the lower number if you find it shutting off when stopping.
Same here using fuse 219 in the driver side fuse panel:
Used one of the Add-A-Fuse/fuse tap wires to the end of the positive lead from the dashcam harness and it receives power as long as the car is in Accessory or Run mode.
The start/stop function does not affect it at all since this fuse remains powered when the car is in "stop" mode. If you shut the car off however, the power to the dashcam is switched off.
Since the Viofo also uses voltage detection/cutoff, you may have to set it as low as 11.8v if your battery drops that low when the car is in "stop" mode at a traffic light, etc. Start at the higher numbers and try the lower number if you find it shutting off when stopping.
Thank you! Where did connect your ground wire?
Last edited by unrecognized88; Mar 18, 2020 at 10:07 PM.
Only fuse to tap is ACC in passenger footwell fusebox. Access that at last resort if you decide to have dashcam to come on only when car is on. I had hardwired to this when I had a119s dashcam 2 years back and there isn't constant battery fuse.
The drivers fusebox is literally right next to the the wheel. On left hand drive car, its left of the wheel by the door edge.
Only fuse to tap is ACC in passenger footwell fusebox. Access that at last resort if you decide to have dashcam to come on only when car is on. I had hardwired to this when I had a119s dashcam 2 years back and there isn't constant battery fuse.
The drivers fusebox is literally right next to the the wheel. On left hand drive car, its left of the wheel by the door edge.
sorry i must have been editing my response while you were replying. I found a picture of it online so I know how to access it now. Just gotta pry it open. With the a129 duo, the 3 wire kit has one tap for acc, one tap for constant on, and one wire for ground.
Still need help identifying the type of fuse. I don't think 219 is a mini fuse. Looks bigger, but I'm not sure. My 98 Lexus has mini fuses and my wife's Lexus has low pro mini fuses. The c300 fuse looks to be a bit bigger, so I think maybe ATO Regular fuses?
Still need help identifying the type of fuse. I don't think 219 is a mini fuse. Looks bigger, but I'm not sure. My 98 Lexus has mini fuses and my wife's Lexus has low pro mini fuses. The c300 fuse looks to be a bit bigger, so I think maybe ATO Regular fuses?
Yes, they are ATO/ATC regular fuses. The link in my original post above is to the correct size fuse taps from Amazon. I have a supply of both sizes now from my various wiring projects.
I finally got off my lazy behind and started the install this weekend for my parents C300, but immediately ran into problems.
I went to tap 204 (constant on) and 219 (ACC) but realized that the orientation of the fuse tap would not allow it to plug in all the way. They can’t just be plugged in any way you want. I was trying to plug the correct “leg” of the fuse tap into the “hot side” of the fuse location, which would make the orientation of the tap point upward and hit the larger fuse 201 above it. I had the same issue with 219.
on my second try, I tried to tap 211 (constant on), which was a spare, and 216 (ACC) which was supposed to be globe compartment lamp. I noticed that I could not get my multi meter to read which side was the “hot side” so I didn’t go further. Upon comparing pictures, some people didn’t even have this fuse located in that spot. I also looked at diagrams and the fuse is supposed to be a 7.5 instead of the 5 that I have.
Any suggestions?
my fuse box:
Fuse diagram:
Online diagram:
someone else’s fuse tap orientation:
Someone else’s fuse box which doesn’t have a 216 fuse:
Last edited by unrecognized88; Aug 10, 2020 at 10:46 AM.
I did 211 and 216 on mine. Use single fuse for 211 and use original 5A for original and insert 7.5A(or whatever it's required for the dashcam) for the dashcam.
I did 211 and 216 on mine. Use single fuse for 211 and use original 5A for original and insert 7.5A(or whatever it's required for the dashcam) for the dashcam.
So my 216 has a 5amp fuse in that location. According to diagrams, that is the glove compartment, which is supposed to have a 7.5amp fuse. That was my first red flag.
I was going to tap that one because I saw your older posts, but I didn’t want to just plug them in. I’ve seen in YouTube installation videos that there’s a wrong and right way to plug in you taps. You have to make sure the correct leg of the tap is plugged into the hot side of the fuse box. In the case of fuse 216, I couldn’t determine which leg that was when using my multimeter. Second red flag, so I called it a day.
So my 216 has a 5amp fuse in that location. According to diagrams, that is the glove compartment, which is supposed to have a 7.5amp fuse. That was my first red flag.
I was going to tap that one because I saw your older posts, but I didn’t want to just plug them in. I’ve seen in YouTube installation videos that there’s a wrong and right way to plug in you taps. You have to make sure the correct leg of the tap is plugged into the hot side of the fuse box. In the case of fuse 216, I couldn’t determine which leg that was when using my multimeter. Second red flag, so I called it a day.
There are 2 12v rails. Yellow side is constant battery rail and black right side is accessory rail. Either 5A or 7.5A is required in your case the glove box and there is no red flag about it, you can even wrap wires to get the correct power when you flip the fusebox. How the piggy back fuse works is that, your glovebox will still be using 5A if you insert in the correct spot. How you test is, insert 5A in the piggyback fuse tap, if glovebox doesnt lights up, it's the other slot. Now, use whatever fuse you think it's good for the dashcam on the 2nd slot.
For 211, you only need single fuse for the dashcam and leave 1st slot empty.
There are 2 12v rails. Yellow side is constant battery rail and black right side is accessory rail. Either 5A or 7.5A is required in your case the glove box and there is no red flag about it, you can even wrap wires to get the correct power when you flip the fusebox. How the piggy back fuse works is that, your glovebox will still be using 5A if you insert in the correct spot. How you test is, insert 5A in the piggyback fuse tap, if glovebox doesnt lights up, it's the other slot. Now, use whatever fuse you think it's good for the dashcam on the 2nd slot.
For 211, you only need single fuse for the dashcam and leave 1st slot empty.
Ok I’ll try these two fuses again. My fuse taps came with 5amp fuses already plugged into the taps, so for 211 I will just leave the fuse as is and plug the tap directly into slot 211.
Did you just plug them in or did you plug the leg circled in red into the right/left slot? This is what I meant about orientation. This leg has to plug into the hot side. Hope I’m making sense. This video around 7:20 explains it better.
The 2nd leg you circle only matters when you want to complete a circuit for example on original 5A fuse on 216 for the glovebox.
For 211, you don't need to complete any circuit because it's a blank spare. Just need a power from it. If one leg don't work, you need to flip it make it work using 2nd leg.
The 2nd leg you circle only matters when you want to complete a circuit for example on original 5A fuse on 216 for the glovebox.
For 211, you don't need to complete any circuit because it's a blank spare. Just need a power from it. If one leg don't work, you need to flip it make it work using 2nd leg.
Gotcha, so for 216 which way did you plug it in? Could you snap a picture of yours whenever you have the chance? I’ll go back in this weekend to install exactly how you did it. Thanks in advance!
The 2nd leg you circle only matters when you want to complete a circuit for example on original 5A fuse on 216 for the glovebox.
For 211, you don't need to complete any circuit because it's a blank spare. Just need a power from it. If one leg don't work, you need to flip it make it work using 2nd leg.
Hey Stockbmw - any chance I could get a quick snap of how your taps are plugged in?
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