DIY: Kremersino Wireless CarPlay for NTG4.0




2) I have been recommending everyone to install the unit themselves. It really is not that hard. I have no prior experience with car audio, electronics, or much of a DIYer myself and I found the job to be quite easy and straight forward. Everything is plug and play and you are not splicing or cutting any wires. All of the trouble shooting has been listed on this forum post, so you can tackle the job with full confidence. I certainly wouldn't trust any shop to do this work on my car but I understand some may have a preference for a shop install or 'might know the guy' or something.
That being said, another member on here paid $200 for the installation of his unit. He is located in Florida for reference. I probably wouldn't pay anyone more than $200.
I'm looking to install on 2010 E350 with NTG 4.0
Last edited by kitkor5; Apr 1, 2021 at 10:14 PM.




The first link you sent, , is great to have for any job, including this one. I wouldn't recommend the second link. Looks like the U shape is too aggressive and it won't be able to get into the air vents. I suggest getting a pick tool set like this. I have a very similar one just with orange handles instead.
https://www.ebay.com/itm/4pcs-Car-Pi...s/203065975181
Last edited by S550e; Apr 2, 2021 at 12:13 AM.




I noticed that there's one harness (a black one) that plugs to the iSmart box (the big one) has video plugs and 12v outs for front cameras, 360 cameras. My car is a standard W204 C63 and I don't have any cameras on it, not even a reverse camera.
I am guesssing I can skip that harness and only use the other two? The one that plugs into the head unit (the one with the 48PIN connector, USB connector, etc) and the one that plugs into the LVDS box. This way I can avoid having unecessary wires running about.
Also, where did you guys attach the wifi-antena? Did you just leave it close to the box in the glovebox?
As for the mic, I'm eager to install it near the AC vent harness, did you guys just clip it using the clip that came with the mic? It seems like a good idea, just worried it might dettach and fall.
I noticed that there's one harness (a black one) that plugs to the iSmart box (the big one) has video plugs and 12v outs for front cameras, 360 cameras. My car is a standard W204 C63 and I don't have any cameras on it, not even a reverse camera.
I am guesssing I can skip that harness and only use the other two? The one that plugs into the head unit (the one with the 48PIN connector, USB connector, etc) and the one that plugs into the LVDS box. This way I can avoid having unecessary wires running about.
Also, where did you guys attach the wifi-antena? Did you just leave it close to the box in the glovebox?
As for the mic, I'm eager to install it near the AC vent harness, did you guys just clip it using the clip that came with the mic? It seems like a good idea, just worried it might dettach and fall.
Last edited by pb39374; Apr 19, 2021 at 11:12 PM.
The Best of Mercedes & AMG
But I hit a snag when disassembling the glovebox. There's a T20 screw on the very bottom of the left side that holds the glovebox in that I cannot get to. My T20 ratchet is too thick to fit in there so I can loosen it.
I managed to loosen every T20 screw in the glovebox except for this one and the god damn thing won't come out without it.
It's this T20 seen here:

I think I'm going to have to go and buy a slimmer T20 tool so I can try and get it out tomorrow.
https://imgur.com/pmVVP8z
Im anxious because I had to drop the install mid way but am running to a shop to get an L-shaped T20 tomorrow so I can dettach the glovebox and wrap up my install.
As for the mic, I'm eager to install it near the AC vent harness, did you guys just clip it using the clip that came with the mic? It seems like a good idea, just worried it might dettach and fall.
Yes that T20 is the most tricky, the space there is just so tight... I hope you will solve it with the L shaped.
I had a fiber optic cable, but if you don't than it should be an easy go, saves you a bit of stress when removing it thinking not to damage it
I managed to get the glovebox out this morning and routes the cables between behind the head unit and the glovebox. I plugged everything up between the HU, LVDS Box and Carplay box, did the long press and got the video from the box!
Then the problems started. I tried fitting the HU back in and couldn't get it in. After a ton of tries, I realized there was probably not enough space to fit the LVDS box + additional 48pin harness + HU back in there.
So I unplug the LVDS box and move it between the HU frame and the glovebox compartment, like they show on the Kremersino Youtube video. Seems like a good idea and now I can fit the HU back in.
Then problems start again, I can't fit the HU back in flush even like this. Maybe I'm going something wrong.
Then things get worse, I boot up COMAND and while everything is plugged (I've replugged the LVDS box on the new location) I get audio + video from Comand, but nothing from the Kremersino box. I checked the connections to the LVDS box and everything looks fine. When I do the long press on the phone-off button, I even hear a "click" from the box, but nothing happens on the screen.
I'm starting to think I might have broken the Carplay box to LVDS box harness that replaces the Comand video with the Carplay box and that this might be why I am not getting carplay video on Comand anymore. I've tried plugging it in and out a couple of times but no success.
Last edited by Heaven7; Apr 20, 2021 at 10:50 AM.
I managed to get the glovebox out this morning and routes the cables between behind the head unit and the glovebox. I plugged everything up between the HU, LVDS Box and Carplay box, did the long press and got the video from the box!
Then the problems started. I tried fitting the HU back in and couldn't get it in. After a ton of tries, I realized there was probably not enough space to fit the LVDS box + additional 48pin harness + HU back in there.
So I unplug the LVDS box and move it between the HU frame and the glovebox compartment, like they show on the Kremersino Youtube video. Seems like a good idea and now I can fit the HU back in.
Then problems start again, I can't fit the HU back in flush even like this. Maybe I'm going something wrong.
Then things get worse, I boot up COMAND and while everything is plugged (I've replugged the LVDS box on the new location) I get audio + video from Comand, but nothing from the Kremersino box. I checked the connections to the LVDS box and everything looks fine. When I do the long press on the phone-off button, I even hear a "click" from the box, but nothing happens on the screen.
I'm starting to think I might have broken the Carplay box to LVDS box harness that replaces the Comand video with the Carplay box and that this might be why I am not getting carplay video on Comand anymore. I've tried plugging it in and out a couple of times but no success.
As I remember the LVDS box is fitting under the HU quite nicely, the problem is the harness. Did you check the dip switches? You might have moved one accidentally, since it was already working.
The problem is that if I am not able to get image back from the box to the car, it might not even be worth it to put it all together as I might have broken a harnesss that is essential to get this to work.
I'm starting to wish I had paid a guy a this point! Haha.
The problem is that if I am not able to get image back from the box to the car, it might not even be worth it to put it all together as I might have broken a harnesss that is essential to get this to work.
I'm starting to wish I had paid a guy a this point! Haha.
I went down again and tried to re-do all the wiring and moved the LVDS box back into the back of the HU. The problem is that I cannot get to the state where I was previously where I had the Carplay video working on the Comand screen.
Even when everything is plugged in properly, I turn on the Comand unit and cannot get the Carplay feed going. When I do the long press on the Comand dial or steering wheel, I can hear the Carplay box "click" but nothing happens on the Comand screen, all I see is the standard MB interface.
I've also tried the dip switches but no dice. At this point I am guessing I have damaged the harness that takes Carplay feed to the LVDS box or the LVDS box itself.
I think I'm going to put everything back together "stock" and e-mail Michael to see if I can get a replacement harness and/or LVDS box.
Before I did that, I tried everything again and could not get the to the point I had reached previously where I had the Kremersino box video feed on the Comand screen. I think my LVDS is working because I get the Comand video on screen. The problem is strictly related to the Kremersino feed and I can hear the iSmart Auto box "clicking" when I do the long press on the hang up button.
This is the harness I think I have damaged:


There is no visible damage but I've tried pluggig it in & out and inspecting it and nothing happens. This is the harness that takes the Carplay video to the LVDS box and, in turn, into the HU, right?
Man, this is super frustrating! Haha.
My screen is blank when ignition on, long press the end call button and the kremersino unit comes on and can see it on the screen. When I exit out, the screen is blank again.
Regardless of which mode the screen is in, the FM radio is playing and stations can be changed through steering controls and command pre sets. While the kremersino unit is running bluetooth, is shows the pandora playing on my phone and responds to pause and change song but the only sound is the FM playing through the MB radio.




Just in case that was too much for some: for Android users worried about compatibility, don't - it works perfectly, both wired and wireless.
I'm trying to figure out if that wasn't my issue, but I'm thinking not. I think my LVDS cables were set up right since I was able to get the COMAND image on the screen perfectly, the only issue is that I couldn't get the image from the Kremersino unit when doing the long press. If I had the LVDS cable the wrong way, I wouldn't get any image at all, right?
I am trying to get Michael to send me a replacement harness but it's taking a while.
Last edited by Heaven7; Apr 29, 2021 at 04:35 PM.



