Hi everyone,

I'm retrofitting heated seats to my 2018 Skoda Octavia Mk3 FL (5E) using the original KUFATEC 43340 wiring harness.

Everything is physically installed and connected correctly. Both front seats (driver and passenger) have heating elements installed.

I'm trying to activate the heated seats using VCDS only, without purchasing or using the KUFATEC 41899 coding dongle.

Vehicle information

- Model: Skoda Octavia Mk3 FL (5E)

- Year: 2018

- Engine: 1.6 TDI DGTE

- VIN: <Removed>

- Climate control: Manual A/C (not Climatronic)

Installed control modules

08 – Auto HVAC

- Part Number: 5E0 820 047 N

- Component: AC Manuell H05 1202

- Coding: 02010004000100001000000000400000

- ASAM: EV_ACManueBHBVW37X 003129

09 – Central Electronics (BCM)

- Part Number: 5Q0 937 084 DA

- Hardware: 5Q0 937 084 CD

- Component: BCM MQBAB B H38 0273

- Dataset: V03935283TP

- ASAM: EV_BCMMQB 019001

Current behaviour

When I press either heated seat button:

- The button illuminates for approximately 2 seconds.

- Then it switches off automatically.

- Both driver and passenger heated seats behave the same way.

VCDS adaptation channels found in Address 08

- IDE07948 – Retention of front passenger seat heater level: changed from Not active to Active.

- IDE01067 – Retention of driver's seat heater level: Active for 10 minutes.

I could not find any other relevant seat heating activation channels in Address 08.

My questions

1. Has anyone successfully installed the KUFATEC 43340 heated seat retrofit on a 2018 Octavia 5E FL using VCDS only?

2. Is there a specific Long Coding or Adaptation procedure required in BCM (09) or HVAC (08)?

3. Does the KUFATEC 41899 dongle simply apply coding that can also be done manually using VCDS?

4. Why do the heated seat buttons illuminate for 2 seconds and then switch off?

5. Is there a specific BCM adaptation or configuration that enables the heated seat retrofit?

I'm particularly interested in the exact VCDS coding/adaptation values for this specific setup.

I would really appreciate any help from someone who has completed this retrofit using KUFATEC wiring and VCDS.

Thanks in advance!

seat cupra heated seat fit

It was a while ago that I did this retrofit myself, I pulled together a bunch of useful links, one of which I noted for coding, it may be of use. It is off a seat cupra forum but should work:

Edited 15 minutes ago15 min by alimac81