mdloops

Maybe I am reading the maintenance schedule wrong. My car is shifting hard and I am feeling engine vibration under hard acceleration. My dealer’s service rep immediately pointed out that he believes plugs should be replaced at the 55k mike service. What I am reading from Audi says otherwise (at 35k then 75k).

Am I misreading the maintenance schedule?

gk1

You are right 35k, 75k, 115k miles...
although I'm doubtful your vibration issue would be spark related. Ask them to check the motor mounts.

m444

Yes, check motor mounts, some have failed at 35k miles.

m444

2016 Audi maintenance schedule, similar to 2013, https://www.audiusa.com/help/maintenance

Perform first at 35,000 miles or 6 years, whichever occurs first. Thereafter, every 40,000 miles or 6 years,
whichever occurs first. Spark plugs- Replace only on the following vehicles: [[color=#0000ff]all vehicles with the 4.0l V8 TFSI.....] - Turbo V8

Perform at 55,000 miles or 6 years, whichever occurs first. Thereafter, every 60,000 miles or 6 years, whichever
occurs first. Spark plugs - Replace (only: A3 with the 1.8l TFSI, Audi Q3, and vehicles with the 3.0l V6 TFSI, 4.2l V8 FSI & 5.2l V10 FSI engines) - Non-Turbo V8

elp_jc

Two related questions: Where can I get a service manual to be able to read all of that technical info? And is there any dash icon or way of knowing the engine is running on 4-cyl? Forgot this car had that. Hope it's disabled when disabling *** (auto start stop), which I always have disabled. Haven't felt any weird behavior, like you feel on SRT vehicles running on 4-cyl. Thanks.