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Customer Reviews

PAC RP4.2-MB11 Wiring Interface

PAC RP4.2-MB11 Wiring Interface Connect a new stereo and retain steering wheel audio controls, USB port, aux in, and backup camera in select 2014-20 Mercedes-Benz Sprinters

MFR # RP4.2-MB11

4.5 out of 5 stars
31 reviews
View this product
Quick delivery

Matthew from Fountain Hills, AZ on 5/17/2025

2018 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Quick delivery and just the part we needed.

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Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Tony from WASHOUGAL, WA on 4/17/2025

2017 Mercedes-Benz Sprinter Passenger

Verified customer (What's this?)
Verified employee review (What's this?)

Worked perfect in 2017 Sprinter Passenger. We had Crutch field create the wire harness. It was plug and play. Reason for 4 stars is the camera switch. Would like a better quality or better looking one than a simple silver switch.

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0 of 0 found this helpful

Needs firmware update for Metris

Gary Ross from FORT COLLINS, CO on 1/5/2025

2019 Mercedes-Benz Metris

Verified customer (What's this?)
Verified employee review (What's this?)

Out of the box it only had minimal support for the Mercedes Metris (2019). I looked it up online and found an updated firmware from the manufacturer. Loaded that onto the device and all the steering wheel buttons worked great. Only thing keeping me from 5 stars is that it doesn't seem to pass on the audio information to the instrument cluster, but maybe that needs to be updated from Mercedes? On the oem unit, the instrument cluster would display audio source and song title, but with this installed it just displays a bunch of dashes, but the steering wheel buttons still change the track and work perfectly.

Pros: - Works perfectly after firmware update for Metris

Cons: - Need to update firmware if installing in a Metris - Doesn't relay information to the instrument cluster display, so the Audio menu just shows blank lines instead of the song info, but the buttons still change the songs.

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0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Steve from Eagle, ID on 1/2/2025

2017 Mercedes-Benz Sprinter Camper Van

Verified customer (What's this?)
Verified employee review (What's this?)

Simple and fast installation. Retained steering wheel controls.

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0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Michael from Saint David, AZ on 1/1/2025

2018 Mercedes-Benz Sprinter Camper Van

Verified customer (What's this?)
Verified employee review (What's this?)

Fit like it was suppose to. The directions for the additional wiring could have been a bit clearer, but I got it done and it works great.

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0 of 0 found this helpful

Made install easy

Steven from Lexington, KY on 5/21/2024

Verified customer (What's this?)
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Made the install easy and straightforward. No complaints so far.

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Crutchfield response on

0 of 0 found this helpful

Good product!

William from Montgomery, TX on 4/21/2024

2016 Mercedes-Benz Sprinter Chassis Cab

Verified customer (What's this?)
Verified employee review (What's this?)

Unit works perfectly, instruction material was concise along with good diagrams.

Pros: Excellent support from Crutchfield tech support and product works well.

Cons: Could have used some more explanation about what the LEDs mean and what should be expected on a fully functional unit.

Crutchfield response on

0 of 0 found this helpful

Excellent Equipment

Gregory from Whitinsville, MA on 3/21/2024

2017 Mercedes-Benz Sprinter Camper Van

Verified customer (What's this?)
Verified employee review (What's this?)

I used this wiring interface to replace my 2017 Sprinter's stock Audio 15 head unit with a Kenwood DMX7709S. It was needed to retain use of the steering wheel controls. Also, it greatly simplified connection between the stock wiring harness and the new head unit. The interface includes connections for the reverse signal so that the stock rear camera's function is retained without needing to run a wire from the backup lights. A connection for the parking brake switch is also included. Included is a pre-wired 3 position switch that can be used to turn on the front or rear camera without shifting into reverse or activating the cameras through the head unit controls. As I do not have a front camera I use it only for the rear camera. It's up to the installer to find an appropriate place for the switch. I put it in the driver side well on top of the dashboard. As expected, the interface does not supply data for dashboard display. So the dashboard no longer shows audio information, direction of travel or phone information. I never used the dashboard to display this information before, so I won't miss it.

Pros: Retains SWC controls, simplifies connections. No need to run wire from the backup lights. Switch for activating cameras.

Cons: Does not supply data for display on dashboard.

Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from NOLANVILLE, TX on 3/17/2024

Verified customer (What's this?)
Verified employee review (What's this?)

Makes install easy, but the steering wheel button interface does not work in our 2018 Sprinter. UPDATE 4/17/24: I was happy with Crutchfield's quick turnaround sending a new interface to replace the one I had that was not responding to steering wheel buttons, and happier when the new one worked. Now I am disappointed. The buttons stopped working after our first trip. This thing is not good.

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Crutchfield response on 6/17/2024
This customer contacted our Tech Support team for help, and they sent out a replacement interface right away. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team. Lifetime tech support comes with every Crutchfield purchase.

0 of 0 found this helpful

It might not be you...

Dave from Encinitas, CA on 2/16/2024

2018 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Think you are losing your mind trying to get this to work in a 2018 Sprinter 2500? I sure did. Crutchfield was very helpful along the way, and this is a pretty easy setup. IF (and that is such an important word) your PAC unit is not defective. The first one we ordered was defective. Began install, Saturday Feb 3, 2024 without success. No power to the head unit. There was no info on the LED lights, so I had to wait until Monday, Feb 5 to call PAC. Using a multi-meter, we determined their unit was defective. Ok, that happens. Crutchfield swiftly sent a replacement. The replacement was MISSING the Accessory Power (Red) wire. This was mental breakdown #2. Again, Crutchfield sent a replacement and this time inspected it before sending. Today, Feb 16th, I wired everything and hooked it all up and I'm very happy to report everything works on the Sony AX-6000 head unit we installed. If you can't get it to work, it might not be YOU. Up next, replacing the factory speakers, but that's a tale for another day.

Pros: Works like a charm if the PAC unit is not defective. Pretty simple setup and install for a first timer.

Cons: Hassle. One defective unit. One unit missing accessory power wire.

Crutchfield response on
Customer review photo

3 of 3 found this helpful

PAC RP4.2-MB11 Wiring Interface

David from Hampton, GA on 1/31/2024

2020 Mercedes-Benz Metris

Verified customer (What's this?)
Verified employee review (What's this?)

Easy installation, great customer support

Pros: Wiring was easy and customer support was on it.

Cons: Had a defective pac, Luckily a new one arrived about 3 days later

Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

David from Jupiter, FL on 12/22/2023

Verified customer (What's this?)
Verified employee review (What's this?)

Works perfect

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Crutchfield response on

0 of 0 found this helpful

Wiring interface

Michael from Bend, OR on 11/26/2023

2018 Mercedes-Benz Sprinter Camper Van

Verified customer (What's this?)
Verified employee review (What's this?)

Great wiring diagram!

Pros:

Cons: Backup camera wiring difficult to differentiate from antenna

Crutchfield response on

0 of 0 found this helpful

Finall

Marvin from Fallbrook, CA on 11/13/2023

2017 Mercedes-Benz Sprinter Camper Van

Verified customer (What's this?)
Verified employee review (What's this?)

Interface worked as advertised but some of the wires were grouped in a way that made connecting to the stereo trickier than it needed to be. Neither of the 3.5 mm plugs were labeled as to where they went. Thank for Crutchfield's tech department.

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Crutchfield response on

0 of 0 found this helpful

This couldn't have been any easier

Tom from Clarksburg, CA on 12/7/2022

Verified customer (What's this?)
Verified employee review (What's this?)

This couldn't have been any easier. I just plugged this into the existing wiring and everything worked. Amazing.

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Crutchfield response on

0 of 0 found this helpful

GREAT PAC interface and Much needed

Sean from USA on 11/28/2022

2018 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Just thought I'd help out anyone running into the same problem I have. (Victor - Tech support) was a big help. I have an 18 Mercedes Sprinter and wanted to upgrade the radio. Purchased the Kenwood DMX4707S and this PAC interface. When I first installed it the backup camera would come on in reverse only but I could not access the camera while in motion or anytime for that matter. After finally a little trial and error I realize the three way toggle switch that is wired into the harness if set in the middle position will let you go to the Kenwood menu and select camera and the backup camera appears. If set in top/bottom position the camera automatically comes on overriding the screen, I"m assuming the other far position would be if you had a front camera. Hopefully this helps someone else.

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Crutchfield response on

4 of 4 found this helpful

Little expensive but you need this

Darien from Frisco, TX on 1/24/2022

2017 Mercedes-Benz Metris

Verified customer (What's this?)
Verified employee review (What's this?)

It works perfectly for a Metris. I talked to a crutchfield rep and he said my car would loose steering wheel controls and back up camera functions. Clearly that person didn't know what he was talking about, so i did more research and this unit is exactly what I needed. I bought the dash kit and a boss unit, everything works perfect

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Crutchfield response on

3 of 3 found this helpful

Great Sprinter wiring interface

Craig from Lilliwaup, WA on 1/17/2022

2016 Mercedes-Benz Sprinter Passenger

Verified customer (What's this?)
Verified employee review (What's this?)

This worked for me with installing an Atoto S8 Gen 2 Ultra into a 2016 Mercedes 2500 passenger (Roadtrek SS Agile). The rear camera and steering wheel controls all work properly. I set the DIP switches to other for the Atoto.

Pros: The majority of the wires were labeled

Cons: It wasn't clear to me how the long-press programming worked.

Crutchfield response on
Customer review photo Customer review photo

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Maryville, TN on 1/5/2022

2018 Mercedes-Benz Sprinter Chassis Cab

Verified customer (What's this?)
Verified employee review (What's this?)

Incorrect wiring harness was sent. Technician told me it had to be hard wired, marching old wiring from previous radio. I was hopeful for better assistance, but I guess that's all there was to offer in my situation

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Crutchfield response on 1/12/2022
Once we saw this review, our Tech Support specialist, AJ, reached out to this customer to help him further. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team right away. Lifetime tech support comes with every Crutchfield purchase.

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Elmwood Park, IL on 9/13/2021

2018 Mercedes-Benz Metris

Verified customer (What's this?)
Verified employee review (What's this?)

Works great. All options work as in the manufacture original setup.Sterling wheel controls backup camera trigger. Highly recommend

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Crutchfield response on
Customer review photo

1 of 1 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Florence, OR on 1/12/2021

Verified customer (What's this?)
Verified employee review (What's this?)

Lots of wires but color coded to match. A couple of wires required a call to customer support which answered my questions.

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Crutchfield response on

0 of 0 found this helpful

Must-have for Mercedes Sprinter with slick camera display switch

Crutchfield customer from Salt Lake City, UT on 6/1/2020

2018 Mercedes-Benz Sprinter Chassis Cab

Verified customer (What's this?)
Verified employee review (What's this?)

Used on a 2018 Mercedes sprinter, this is a must-buy in my opinion. Keeps all the factory functionality, has clearly labeled wires, has instructions that are 8/10 easy to follow, and the bonus is the "force camera" switch which installs super clean in a location of your choosing to manually display the rear or front camera (if you have one). Really a slick solution. Definitely recommend.

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Crutchfield response on

2 of 2 found this helpful

Wire Harness That Retains Steering Wheel Control Functions

Crutchfield customer from Ilwaco, WA on 5/16/2020

Verified customer (What's this?)
Verified employee review (What's this?)

I purchased this harness from Crutchfield to install with my new Kenwood DDX9906XR head unit. The PAC RP4.2-MB11 Wiring Harness interface module works well and Crutchfield ReadyHarness Service did a great job connecting it to the radio harness. Everything connected ok between the radio and to the OEM harness. My only issue was that there was an 3.5mm jack that was unlabeled and I still don't know what it goes to. Also there was a 3.5mm jack that was labelled Steering Wheel Control but had no instructions on where to connect it. I connected that to the iDataLink connection on the back of the Kenwood, but was then told by Crutchfield Support that the iDataLink port is proprietary and the PAC harness doesn't work with it. So that jack is unused in the harness and the steering wheel control is actually through one of the other connectors. The PAC does not provide the full functionality of the iDataLink Maestro harness for reporting vehicle status but evidently the Mercedes Sprinter is not compatible with the Maestro, so the PAC was the best option. It does retain functionality of the steering wheel controls, except that the radio station frequency no longer shows on the dash readout.

Pros: Retains steering wheel functionality Crutchfield ReadyHarness Service greatly simplified installation

Cons: Doesn't provide the full vehicle status to the head unit like the iDataLink Maestro. Could've used a wire diagram or instructions saying what the wires connect to.

Crutchfield response on

2 of 2 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Wheat Ridge, CO on 5/6/2020

2018 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Super easy hookup and was able to keep the OEM Backup camera. The dip switch selection for brand of unit purchased made hookup a breeze.

Pros: Dip switches and OEM Backup Camera Integration

Cons: Non so far

Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Brooksville, FL on 3/24/2020

2015 Mercedes-Benz Sprinter Chassis Cab

Verified customer (What's this?)
Verified employee review (What's this?)

Does what expected....had some issue upgrading firmware, only because the upgrade file was named , for example v09 even though it was newest v11. Anyway instant chat resolved issue. In regard to connectors to interface with Meecedes....don't use the extension cable for the Mercedes in dash usb ....if you do then Android Auto will not work when you plug your phone into the Mercedes usb. The usb cable from the radio is long enough to bring it out of the dashboard at a convenient place. Adapter for the Mercedes antenna also did not fit. I resolved by cutting off the plastic housing allowing me to make the connection then zip tying the wires together. The attached toggle switch allows the backup camera to be displayed on the radio. I used instant chat with company to understand that...instructions don't explain. Also a red/wht wire is not used, would have been nice to mention that fact.

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Crutchfield response on

0 of 1 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from Boulder, CO on 1/25/2020

2017 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Does the job and worked. The instructions could be improved with better directions and diagrams.

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Crutchfield response on

0 of 0 found this helpful

Worth Every Penny

Crutchfield customer from Sacramento, CA on 12/2/2019

2018 Mercedes-Benz Sprinter Passenger

Verified customer (What's this?)
Verified employee review (What's this?)

Awesome! This wiring interface made installation easy and flawless. Very impressed

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Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Crutchfield customer from San Diego, CA on 8/18/2019

2017 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

What a great interface. There were a couple of wires not marked in instructions but I figured it out, otherwise no only were things labeled but color coded to match stereo.

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Crutchfield response on

0 of 0 found this helpful

Worked on Mercedes 2500 sprinter

Eric from Colorado Spgs, CO on 12/3/2018

Verified customer (What's this?)
Verified employee review (What's this?)

Worked perfect to add aftermarket stereo to my 2015 Mercedes sprinter 2500 and keep factory steering wheel controls and back up camera

Pros: Plug and play.

Cons: Kind of big unit

Crutchfield response on

1 of 1 found this helpful

Makes for easy installation

Dave from Edwards, CO on 6/24/2018

2015 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

Made for very easy installation. Everything worked as expected and plugged directly into my factory harness. My only compliant is there is a toggle switch to control front/rear/side cameras, I only have a rear camera so I would have preferred to remove that switch and hardware the wires correctly.

Pros: Makes for very easy installation

Cons:

Crutchfield response on

0 of 0 found this helpful

PAC RP4.2-MB11 Wiring Interface

Darin from Longmont, CO on 3/15/2018

2014 Mercedes-Benz Sprinter Cargo

Verified customer (What's this?)
Verified employee review (What's this?)

This didn't work for some reason in my van. I'm waiting for a second modual to be mailed to me hopefully I have better luck.

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Crutchfield response on

4 of 6 found this helpful

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