Three questions Re: Hardwire installation of R3 in 2019 Audi A4

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Hello:
I am having a Uniden R3 hardwired into a 2019 Audi A4 Quattro.

1. The installer was suggesting that a brownout module be installed because the Audi has the engine automatic stop/start feature.
This seems like a good idea, but I was wondering if it were required in R3 installations in these types of cars or is it just cheap insurance against voltage drops.

2. The installer's proposed route for the hardwire is pretty typical: just running down the driver's side A pillar to the fusebox. Aside from making sure the installer removes the trim completely and makes sure the power cable properly runs behind the airbag in that pillar, are there any other pitfalls in this type of installation in this particular car? Anything I should request the installer do specifically during the install?

3. Finally, I bought the Blendmount HardTap cable for the installation: https://www.amazon.com/dp/B0062PO02Q/?tag=rdf0cd0c-20 after reading about all of the trouble with the SNS harnesses on this forum. I also didn't want to use the cable that Uniden sells because I didn't want the extra mute/LED box. Does anyone have any experience with the HardTap cable and/or would you suggest a different brand?

Many thanks!
 

MFan

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DChiJEllis

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I have a hybrid with auto start/stop and I didn’t need a brownout booster with my R3.

As for the wiring, make sure he is careful removing the pillar trim and routing the wire around any airbag; not over it.
 

plm

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I've never found an issue with the auto start/stop affecting my R7 on the odd occasions I've enabled it, so I'd expect the R3 to be similar. The BlendMount HardTap cables are great. I did cut off the inline fuseholder though, since I was using an Add-A-Fuse that already fused the new circuit, but no complaints with the product at all.
 

1move

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You can tap it into the sunroof switch or the rearview mirror and you should be fine. Did that in my S4 and A4.
 

Uniden Fan

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Thanks for all of your advice, everyone--your patience with the new guy is much appreciated!

Forgot to mention, I'll be using the Blendmount for the R3. I like to remove the RD from my car when I part since I sometimes have to park in some sketchy places, so it seems like it will fit the bill.

I also plan to put a RJ11 connector between the hardwire and the R3 because in my last vehicle, the RJ11 connector wore out on my power cord. If that happens again, at least I can easily replace the connector wire instead of having the crimp on a new RJ11.

Install is scheduled for next week, and I'll post back after that.

Thanks again!
 

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Update: installation went fine last week. Wire got routed safely, no brownout module necessary (although on voltage display mode, I can see the voltage drop a bit when Auto Stop is active---no reboot of the R3, so no big deal), and the HardTap from BlendMount was just the right length.

I did run into an issue trying hook up the pigtail I proposed: I needed a straight through (instead of a crosswired) connector to make this work, which I am waiting to be delivered.

The blendmount leaves plenty of space to hit the buttons at the top surface of the R3 and it holds the R3 securely with no wobble or visible vibration. Looks clean and professional.

Thanks again for all your help!
 

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