2018 S4 S-Tronic Fluid Change - What's the Interval?

ClearTheCode guidance (Audi · Maintenance & DIY)

Summary: For 2018 S4 S-Tronic Fluid Change - What's the Interval?, work through these steps on your 2016+ vehicle:

1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
5. Test the common fix — follow model-specific service procedures; one change at a time.
6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone, I've got a 2018 Audi S4 Premium Plus with about 55,000 miles on it. I'm trying to figure out the recommended service interval for the S-Tronic transmission fluid. I've heard different things, some say 40k, some say 60k.

Is this something I can tackle myself with the right tools, or is it best left to the dealership or an independent Audi specialist? I'm pretty handy, but I know thes…

This is educational guidance, not a substitute for hands-on diagnosis.