While a new a6 is certainly tempting, i think it can be done without replacing any of the existing mmi 3g+ components Below are the symptoms of a leaking heater core I've found solutions from naviplus and navtool, both of which involve installing a carplay.
Removing Heater Core Without Removing Dash: A Complete Guide for the
Is your heater core leaking or are you not getting any heat out of the system
If you aren't getting any heating than i would eliminate the climate controller and a plugged up core first.
Essentially, the heater core has become clogged, and you will need to flush it by disconnecting the hoses connected to it (located next to the battery under the hood) and using a garden hose along with. If it is normal, it may be caused by a clogged heater core or a malfunctioning control system Cleaning the heater core or replacing the relevant parts can solve the problem. A partially clogged heater core often creates uneven heating throughout your car’s cabin
You might notice one side of the car stays warmer. The heater core, a crucial component of your vehicle’s heating system, plays a vital role in keeping you warm during chilly days However, like any other car part, it can accumulate debris and. Learn how to diagnose, reverse flush, and maintain your heater core to prevent future, costly blockages.
Car is a 2.7t allroad if that makes a difference.
In this video i show how one can restore the loss of heater performance on a 2004 audi allroad This applies to any mid 90's to late 2000's audi, and many other vehicles too. A clogged heater core can bring your driving comfort to a standstill, especially during cold weather This essential component of your vehicle’s heating system ensures a warm and cozy cabin,.
If heater core is clogged, can it be unclogged Is it possible to unclog a heater core My wife's 2001 a4 1.8tq with 202k miles is not producing any heat I've searched, but did not find an answer if it can be.
Here is the long form video on how to flush your heater core also the link for the tool is in the description avoid heater core replacement
Simple jeep wrangler heater fix