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I recently installed a Viofo A119v3 in my wife's 2019 GLC 300 4matic & used add-a-fuses at locations 206 & 216 (5A at both, but could probably replace with 2.5A or 3A) to enable the use of parking mode.
The Viofo hardwire kit requires connections to both switched power (216) & constant power (206) to work properly.
I need to clean up the excess wiring behind the fuse panel cover, but the dashcam automatically switches on when the car starts, turns off shortly after we park, & would go into parking mode if & when it's turned on.
I also want to install a Viofo A119v3 in my 2016 GLC 350e.
There is a 5A Fuse in Position 216 which is switched power I can use.
I also need constant power, but there is no fuse at the position 206. I do not have a analog clock.
Is it also possible to use for example the pos 205 (Ignition) or is that not very wise?
Or 204 Diagnose?
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already found it. It is just a spare fuse. I can use it !
Last edited by tjerkpolle; Jun 19, 2020 at 01:59 PM.
Reason: solved!
Other Question: I have the Viofo hardwire kit. What is the best Voltage Setting for the hardwire kit not to drain de GLC battery?
I, too, have the Viofo hardwire kit & have set mine to the highest voltage setting (12.4V) so the battery won't be forced to run below its nominal 12V output. This should prevent excessive drain.
Last edited by oskidbear; Jun 19, 2020 at 09:26 PM.
Reason: Added title to post
Hi Oskidbear, thanks for your help. I use the same positions, but I think hou have the right fuse tap (position 216) the wrong way around?
I measured that the 12V is on the left side from fuse 216. So with the fuse tap positioned as you pictured the fuse does not work?
Am I right?
@oskidbear Yes, but the way I positioned the fuse tap it also works. @oskidbear @HeroAychillus Guys maybe I 'am wrong.
But I measured the Fuse position 216.
I measured without the fuse/fuse-tap in position the feed is on the left side.
In the pictures/schemes I also post you can see how the fuse tap works.
I think the fuse from the fuse tap in second position for the dashcam does not work. I think if you pull out the fuse from the fuse tap you still get signal with ignition on and that is wrong??
Regarding the correct orientation of the add-a-fuse in position 216,
You could be right. I'm definitely not an expert on electrical systems.
When I installed my add-a-fuse at 216, I used the following to guide me:
photo from post #1; &
maintaining the same physical orientation of the original fuse from 216 as if there was no add-a-fuse (current rating reads upside down when installed; does this matter for a fuse?)
Is this incorrect? It wouldn't surprise me if it was, but the system works so far. I'm definitely not the right guy to ask why...
When I get some time next weekend, I'll pull out the fuse from 216 to confirm whether I still get power to the camera. Should I pull the original fuse from 216 or the one for the camera?
Hi,
I have my Xiaomi 70mai Dash Cam Pro installed this way in my 2020 GLC SUV. This camera has a small battery inside so it needs power after ignition. When a car is parked camera is monitoring surround and records collisions and events on parking.
The camera was connected by an MB workshop so you can be sure that you can use this fuse slot. It is hard to find a fuse map for GLC2020. I don't know a slot number. I attached two pictures. It is a passenger foot fuse box.
I ordered the second camera for my friend. I put a cable to the fuse box first and surprise - GLC 2019 has a different fuse box.
I saw earlier posts in this thread but I have already a wire in a passenger foot box. I would like to avoid removing it on the other side (driver instrument panel).
Is there any fuse in the foot passenger box (GLC 2019) which I can use to connect a camera? (powered after ignition)
Just a short message to say thanks for taking the time to post this thread. Hugely useful and I can confirm the fuse box drivers side (uk car) was fuse 216 as mentioned. Fuse to glove box led. I fitted a Blackvue DR900x 2ch unit and it was so easy to fit in the GLC 350. In my Range Rover it was a bit of a pig to fit the same unit.
Rear cam was so easy too.
i can post pics if required. But huge thx again saved me so much time with the fuse numbering.
Do you have a 2020? If you do, I don't think the fuse map matches. It's completely different than this on my GLC2020 GLC43.
The only 2 I want to touch are 213 and 211 and both are always on. And I can't even be sure it the old 2017-19 map is valid here any more.
If anyone have access to the 2020 fuse map would love to have a copy here.
Not really entertaining passenger side fuse box, the wire run isn't as clean from there.
This pic is like our 2020; there is nothing there in the 216 slot, not even a usable slot to stick a fuse in. Now where to tap for a radar detector that’s not hot?
Last edited by Bmo Pete; Oct 18, 2020 at 10:10 PM.
for folks with GLC 43 2020. I tested and could not find any fuses with switched power in front left or right fuse boxes on my wife's GLC 43 2020. Very frustrating, I ended up pulling wire to the trunk. Also I was not able to use mirror tap wires - positive wire was always on.
I decided to wire to the rear fuse box as they seem to not have ignition/switched fuses any more after 2020 refresh. Fuse 216 is gone as well on front.
I also decided to wire on bottom alone the seats - it did require me extending power cable but fortunately USB cable for the rear camera was long enough (23 ft). I did not want to risk it wiring over side air bag.
Mission accomplished but with researching, reading, watching tons of youtube video, picking stuff on amazon etc. it took me over 30 hours. I think next time I am just going to pay for this as it was too much "fun" for me.
Mirror tap does not work any more like it is used to be because power from mirror won't shut off even after 30 minutes after ignition is turned off. But I learned that my Uniden R3 has a feature to auto shut off itself after 1 hour if GPS speed is 0. If I knew about this upfront, I would wire radar detector to the rear fuse as well when I had all the panels open but I do not want to think about doing this all over again So if you have 2020 and later, you might want to hard wire both dashcam and radar detector to the rear fuse box at once.
Last edited by Barbaris; Sep 11, 2021 at 11:36 AM.
for folks with GLC 43 2020. I tested and could not find any fuses with switched power in front left or right fuse boxes on my wife's GLC 43 2020. Very frustrating, I ended up pulling wire to the trunk. Also I was not able to use mirror tap wires - positive wire was always on.
I wonder how bad it is to leave a radar detector on always on. Granted, the power should be manualy disconnected for long breaks, but other than that, driving the car every day, I am not sure it's a big deal.
I decided to wire to the rear fuse box as they seem to not have ignition/switched fuses any more after 2020 refresh. Fuse 216 is gone as well on front.
I also decided to wire on bottom alone the seats - it did require me extending power cable but fortunately USB cable for the rear camera was long enough (23 ft). I did not want to risk it wiring over side air bag.
Mission accomplished but with researching, reading, watching tons of youtube video, picking stuff on amazon etc. it took me over 30 hours. I think next time I am just going to pay for this as it was too much "fun" for me.
Mirror tap does not work any more like it is used to be because power from mirror won't shut off even after 30 minutes after ignition is turned off. But I learned that my Uniden R3 has a feature to auto shut off itself after 1 hour if GPS speed is 0. If I knew about this upfront, I would wire radar detector to the rear fuse as well when I had all the panels open but I do not want to think about doing this all over again So if you have 2020 and later, you might want to hard wire both dashcam and radar detector to the rear fuse box at once.
I did not know that about the Uniden R3 (auto shutoff), I have one in each car; will have to test that, though I already mirror tapped the Audi.
I did not know that about the Uniden R3 (auto shutoff), I have one in each car; will have to test that, though I already mirror tapped the Audi.
I've learned about it 2 days ago. It works fine. Goes off after an hour of no movement according to GPS or no GPS signal. It's annoying to turn it on every time, but I guess it's less annoying than the rear fuse box wire
i'm curious, is it not possible to use "seat heating 305/306" or "exterior mirror function 302" or "sunroof, tilt 312,317" as a switched source for a dashcam instead of running wire to the rear?
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I'm definitely not the right guy to ask why... 
So if you have 2020 and later, you might want to hard wire both dashcam and radar detector to the rear fuse box at once.
