Sprinter-Forum    
 

Go Back   Sprinter-Forum > Sprinter-Based RV's & Conversions > Sprinter-Based RV Brands > Leisure Travel Vans > Unity


 
Thread Tools Display Modes
Old 09-27-2018, 04:47 AM   #1
msmolow
2019 Unity CB / 2018 Chas
 
Join Date: Oct 2017
Location: Northeast Pennsylvania
Posts: 158
Thanks: 6
Thanked 88 Times in 54 Posts
Default New Head Unit with Original Microphone

2019 Unity Corner Bed

I recently replaced the OEM head unit with a Kenwood Excellon and a PAC RP4.2-MB11 Wiring Interface. Purchased from Crutchfied. I didn't like having to add the Kenwood microphone so I traced out the original mic wiring.

The Mercedes mic is located above the overhead light unit. Two wires, purple and grey, which terminate in the radio wiring harness white sub unit. Confirmed with a continuity test.

I would have preferred to add a pin out to the PAC RP4.2-MB11 interface but couldn't find any online so I tapped into the wires before they entered the sub unit. For the Kenwood I used a 3.5 mm mono plug to bare wire, available on Amazon, wiring the purple as positive.

https://www.amazon.com/gp/product/B0...0?ie=UTF8&th=1

So far it's working well.

Pics attached: Mic wire / wiring harness / continuity test. Not shown is where I tapped.
Attached Images
File Type: jpg 20180926_171548.jpg (59.2 KB, 181 views)
File Type: jpg 20180918_172519.jpg (43.3 KB, 161 views)
File Type: jpg 20180926_161007.jpg (58.4 KB, 159 views)

Last edited by msmolow; 09-27-2018 at 04:56 AM.
msmolow is offline   Reply With Quote
The Following 2 Users Say Thank You to msmolow For This Useful Post:
mikeme (10-31-2018), Trekker (04-05-2019)
Old 09-27-2018, 05:03 AM   #2
alichty
2014 LTV Unity TB
 
alichty's Avatar
 
Join Date: Jul 2013
Location: Vancouver, WA
Posts: 1,992
Thanks: 267
Thanked 1,299 Times in 798 Posts
Default Re: New Head Unit with Original Microphone

Where is the plug pair shown in the second image located? I have a 2014 chassis dating to when LTV was installing non Mercedes head units and am wondering if MB put a mic up there anyway. I hate having an external mic exposed.
__________________
Alan Lichty
Mistral - 2014 Unity TB
alichty is online now   Reply With Quote
Old 09-27-2018, 05:24 AM   #3
msmolow
2019 Unity CB / 2018 Chas
 
Join Date: Oct 2017
Location: Northeast Pennsylvania
Posts: 158
Thanks: 6
Thanked 88 Times in 54 Posts
Default Re: New Head Unit with Original Microphone

The mic is encased in the dome light unit. If your 2014 is the same you will see a grille in the rear of the dome light behind which is the mic. You will not need access to the mic itself. The dome light is held in the ceiling by friction tabs. Pry out the light unit from the passenger side. Friction tabs are on the passenger side, driver side has hooks that engage the ceiling. You will see the plug pair sitting on top of the unit. The picture above shows the dome light hanging after removal. The wire with the label enters the dome light to the mic.

I took the picture to remember the wire colors not to document the install. I did not think to document until after I closed everything up. Sorry.

Here's a stock Mercedes dome light unit I downloaded from the Internet. You can see the grille. The plug pair is mounted to surface you can't see.
Attached Images
File Type: jpg dome light.jpg (6.9 KB, 137 views)

Last edited by msmolow; 09-27-2018 at 05:39 AM.
msmolow is offline   Reply With Quote
The Following User Says Thank You to msmolow For This Useful Post:
alichty (09-27-2018)
Old 09-27-2018, 06:30 AM   #4
alichty
2014 LTV Unity TB
 
alichty's Avatar
 
Join Date: Jul 2013
Location: Vancouver, WA
Posts: 1,992
Thanks: 267
Thanked 1,299 Times in 798 Posts
Default Re: New Head Unit with Original Microphone

Yeah - that looks exactly like mine including the grill. I will pop mine out and see if MB just includes that as part of the dome light assembly. I'd love to use this with my Pioneer AVH4100NEX head unit.
__________________
Alan Lichty
Mistral - 2014 Unity TB
alichty is online now   Reply With Quote
Old 09-27-2018, 01:52 PM   #5
woundedpig
2018 Unity MB
 
Join Date: Aug 2009
Location: Fredericksburg, Texas
Posts: 755
Thanks: 109
Thanked 438 Times in 270 Posts
Default Re: New Head Unit with Original Microphone

Quote:
Originally Posted by msmolow View Post
2019 Unity Corner Bed

I recently replaced the OEM head unit with a Kenwood Excellon and a PAC RP4.2-MB11 Wiring Interface.
What control/interface functions, if any, did you lose with the wiring harness you used?

Also, which Excellon did you end up using?

Thanks
woundedpig is offline   Reply With Quote
Old 09-27-2018, 02:49 PM   #6
msmolow
2019 Unity CB / 2018 Chas
 
Join Date: Oct 2017
Location: Northeast Pennsylvania
Posts: 158
Thanks: 6
Thanked 88 Times in 54 Posts
Default Re: New Head Unit with Original Microphone

I lost radio text on the remote dash display behind the steering wheel, but all steering wheel buttons continue to function and are programmable. Mercedes dash information is unaffected. I think the idatalink maestro harness maintains remote text but they do not make a harness for Mercedes. The PAC RP4.2 MB-11 which I used maintains all functionality except the remote text.

Kenwood DMX905S. I like the Kenwood but the Sprinter cab is so wide the LCD display is dull because of the wide view angle. I have to lean 6 inches to the right for a bright view. It's acceptable because it does not have GPS. I don't like a radio GPS because the radio location requires you take your eyes off the road to view the map. I prefer a GPS held above the dash where you can view the road at the same time. If I was using the unit as my GPS it would be a nuisance. You can still read the screen but the colors are not as bright off angle.

The PAC harness has to have its wires spliced into the Kenwood connector. Not difficult but you need to figure out which wires splice together. For $25 Crutchfield will do it for you. Worth the money in time saved.
msmolow is offline   Reply With Quote
Old 05-01-2019, 08:00 PM   #7
Trekker
Trekker
 
Trekker's Avatar
 
Join Date: May 2009
Location: Palm Beach, FL
Posts: 348
Thanks: 107
Thanked 127 Times in 86 Posts
Default Re: New Head Unit with Original Microphone

Removed the stock Alpine unit in my 2017 Sprinter and replaced it with a Kenwood DDX396BT unit. Also replaced the door speakers with Kicker two-way speakers, removed the center dash speaker and the two tweeters in the corners of the front window. Added a Kicker tweeter in each A-pillar. Vast improvement! Did not connect the OEM mic but used the Kenwood mic and mounted it right above the radio in the tray. Phone listeners have told me that speaker phone mode is excellent quality. The Sprinter is an acoustically challenging vehicle due to the large area and hard surfaces, but the Kenwood unit has a LOT of functionality to alter the sound to suit the environment. A superior unit to the Pioneer Apple CarPlay unit I added to my old 2008 Sprinter. Better sound, simpler to operate, better user interface.

Used the PAC interface and bought the Crutchfield wiring adapter. Good advice! 25 bucks well spent! Thanks. All went smoothly, except that the input jack on the Kenwood deck that accepts the Sirius plug died after about a week. Crutchfield was excellent and shipped a replacement overnight at no charge!

Now to sell that old P.O.S. Alpine deck for cheap!
Attached Images
File Type: jpg IMG_8324.jpg (94.9 KB, 72 views)
File Type: jpg IMG_8210.jpg (151.1 KB, 65 views)
__________________
2018 Roadtrek Agile Eco-Trek
Trekker is offline   Reply With Quote
The Following User Says Thank You to Trekker For This Useful Post:
SSTraveler (05-02-2019)
Old 05-03-2019, 01:45 PM   #8
Scarecrow
2017 LTV Unity Murphy Bed
 
Scarecrow's Avatar
 
Join Date: Sep 2015
Location: Hyattsville MD
Posts: 2,520
Thanks: 1,082
Thanked 1,150 Times in 601 Posts
Default Re: New Head Unit with Original Microphone

This is a timely subject because my recent Kenwood installation uses an external microphone -- and everybody complains they cannot hear me well. I will experiment with the settings, but I was even considering a headset to put on while making calls when driving. It's really the road noise that drowns everything out. As much as I try, I have not been able to contain much of it.
__________________
Here's an old saying I just made up:
"The older a man gets, the more clearly he remembers things... that never really happened."
Scarecrow is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 12:43 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.