Hi,

I’ve got two issues with my Superb and could use some solid advice.

1) AC not working

System has refrigerant – it was missing about 60g, so nothing major. The problem is the compressor doesn’t run at all (0 A, 0 rpm).

Here are the faults:

VCDS:

 Address 08: Auto HVAC       Labels: None
Control Module Part Number: -----------    HW: -----------
  Component and/or Version: Climatronic   0709
           Software Coding: 0000000000
            Work Shop Code: WSC 00000 000 00000
              ASAM Dataset: EV_Climatronic A01010 (SK46)
                       ROD: EV_ClimaAutoBasis_SK46.rod
                      VCID: 6FED66BBB69D05E323-803A
3 Faults Found:

9481988 - Air Quality Sensor 
          B10AF 04 [00001001] - Internal System Fault
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 3
                    Fault Frequency: 254
                    Reset counter: 133
                    Mileage: 247154 km
                    Date: 2026.02.07.
                    Time: 18:09:59

9477872 - AC Compressor First Run-In 
          B109E F0 [00001001] - Not Performed
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 42
                    Mileage: 247154 km
                    Date: 2026.02.07.
                    Time: 18:09:59

13636352 - Control module not coded 
          U1013 00 [00001001] - -
          [New feature! Extended UDS fault detail is only supported by current gen. interfaces]
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 42
                    Mileage: 247154 km
                    Date: 2026.02.07.
                    Time: 18:09:59

Measured blocks:

Address 08: Auto HVAC  (-----------)
10:45:42
  IDE00021   Engine speed 1000 /min
  IDE00025   Coolant temperature 72 °C
  IDE00198-ENG100282   Refrigerant pressure-MUX Kaeltemitteldruck 4.0 bar
  IDE00325   Diagnostic mode VW - diagnostic mode 
  IDE00966   Compressor current: actual value 0.000 A
  IDE00968   Compressor speed 0 /min
  IDE00969   Compressor load 0.0 Nm
  IDE00973-ENG100004   Outside temperature-MUX Temperatur 10.0 °C
  IDE00993-MAS01281   Status of input signals 11-Back-up lamp OFF 
  IDE01058   Country coding Germany 
  IDE01420   Compressor shut-off requirement: penultimate Outside temperature too low 
  IDE02472   Air-conditioning operation information heating 
Friday,06,March,2026,19:38:39:00009
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 25.3.1.1
Data version: 20250415 DS365.0
www.Ross-Tech.com

Autocom:

Climate (Climate control - Climatic)
DTC Description
B10AF04 - Air quality sensor, defect.

- Permanent
Date 31-14-2127
Distance indicator 256572 km
Fault delay counter / driving cycle 42
Fault frequency counter 254
Priority 3
Time 10:49:37

B109EF0 - Control module; not coded

- Permanent
Date 31-14-2127
Distance indicator 256572 km
Fault delay counter / driving cycle 134
Fault frequency counter 1
Priority 2
Time 10:49:37

U101300 - Control module; not coded

- Permanent
Date 31-14-2127
Distance indicator 256572 km
Fault delay counter / driving cycle 134
Fault frequency counter 1
Priority 6-> information
Time 10:49:37

The car is newly bought, no history. I don’t know if the Climatronic panel was replaced before. The Columbus unit is dead, not sure if that could affect the AC (I assume no, but mentioning just in case).

What stands out:

• “control module not coded”

• “first run-in not performed”

• compressor completely inactive

Where would you start: coding, basic settings, or checking compressor power supply straight away?

---

2) Mild lowering (daily use)

I want to lower the car slightly, around 15–20 mm, nothing extreme. Thinking about springs from Passat B6 Sportline (around -19 mm).

Questions:

• has anyone done this swap on Superb?

• how’s the comfort compared to stock?

• is it plug & play or are there any issues?

No coilovers – it’s a daily, just want it a bit lower but still comfortable.

---

Thanks in advance for any useful input 👍

The Superb MK2 with standard ride height suspension uses 70mm front shock absorber buffers and 133mm rear shock absorber buffers.

The Superb MK2 with lowered ride height suspension uses 55mm front shock absorber buffers and 118mm rear shock absorber buffers.

So if changing from standard ride height springs to lowered ride height springs, the buffers need to be changed to 15mm shorter ones. This keeps the amount of suspension travel about the same as before, ie. you don't lose suspension travel.

Lowered ride height can be just as comfortable as standard ride height if you choose springs that have the same stiffness, ie. the same wire diameter.

55mm front buffers 1K0412303F (Superb MK2) (lowered ride height)

https://www.autodoc.co.uk/car-parts/oem/1k0412303f?supplier%5B%5D=10249

118mm rear buffers 3C0511359B (Superb MK2) (lowered ride height)

https://www.autodoc.co.uk/car-parts/oem/3c0511359b?supplier%5B%5D=10249

Edited 3 May3 May by Carlston

ok, I just wonder if rear passat springs will fit cause rear suspension differs from passat and I wonder if ride height will be same front and rear.

Any ideas how to sort ac?