330busdriver

Hi all!
New member here!

I recently picked up a new A5 sportback komfort this week.
I have noticed when driving at highway speeds, I often have to fight the steering wheel to stop the car from changing lanes on its own. It’s almost like the car is driving alongside two magnets and keeps getting pulled from side to side.

Alignment is good and tire pressure is normal. It’s currently on 19” low profile summers.

I have tried all drive select options and haven’t noticed a difference besides dynamic being a little worse.

Any ideas?

Cv640pilot

Is the lane keeping assist on or off? Button is on the end of the turn signal stalk

330busdriver

Cv640pilot

I picked mine up this week as well and it tracks very straight. I had them put the winter wheels on mine and noticed (after getting a TPMS warning) that they weren't inflated properly. Check your tire pressures, something could be off there.

Glisse

That is not normal behaviour. Not sure how you know alignment is good, but check wheel bolts are tight and that the dealer has not left the shipping blocks in. Then take it to the dealer.

You don't list a location, but IIRC Komfort is a packaging description used in Canada. I would have thought the ambient temps are still far too cold for high performance summer tyres, but that still shouldn't cause that behaviour unless you had massive sidewinds.

330busdriver

Glisse

You really need around 7°C for the summer compounds to start working correctly. Once you are down at 0°C or below, the grip level falls off dramatically unless you can keep the tyres in their temp operating window, which is almost impossible on a highway at those ambient temps. Personally, I would have thought there's enough of the season left to warrant putting winter tyres on now, and am a bit surprised the dealer was happy delivering your new car on summer tyres. Although IIRC Quebec is the only province where that is mandatory. You will find a substantial improvement in grip levels. And braking distances. Stay safe.

330busdriver