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2019 A5 sport back has mind of its own ?

2019 A5 sport back has mind of its own ?

 
Old 03-17-2019, 06:07 AM
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Default 2019 A5 sport back has mind of its own ?

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. Itís 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. Itís currently on 19Ē low profile summers.

I have tried all drive select options and havenít noticed a difference besides dynamic being a little worse.

Any ideas?
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Old 03-17-2019, 07:14 AM
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Originally Posted by 330busdriver View Post
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. Itís 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. Itís currently on 19Ē low profile summers.

I have tried all drive select options and havenít noticed a difference besides dynamic being a little worse.

Any ideas?
Is the lane keeping assist on or off? Button is on the end of the turn signal stalk
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Old 03-17-2019, 07:24 AM
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Originally Posted by Cv640pilot View Post
Is the lane keeping assist on or off? Button is on the end of the turn signal stalk
Hi, sorry for not specifying.
I donít have any assistance features.
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Old 03-17-2019, 07:40 AM
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Originally Posted by 330busdriver View Post


Hi, sorry for not specifying.
I donít have any assistance features.
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.
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Old 03-17-2019, 09:27 AM
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Originally Posted by 330busdriver View Post
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. Itís 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. Itís currently on 19Ē low profile summers.

I have tried all drive select options and havenít noticed a difference besides dynamic being a little worse.

Any ideas?
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.
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Old 03-18-2019, 04:32 AM
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Originally Posted by Glisse View Post
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.
Based on some research and the fact that the alignment and pressure check all come back ok, the most probable cause seems to be the temperature in combination with the summer performance tires.

We will see how it handles with the temps warming up this week.
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Old 03-18-2019, 06:16 AM
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Originally Posted by 330busdriver View Post


Based on some research and the fact that the alignment and pressure check all come back ok, the most probable cause seems to be the temperature in combination with the summer performance tires.

We will see how it handles with the temps warming up this week.
You really need around 7įC for the summer compounds to start working correctly. Once you are down at 0įC 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.
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Old 03-18-2019, 06:24 AM
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Originally Posted by Glisse View Post
You really need around 7įC for the summer compounds to start working correctly. Once you are down at 0įC 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.
Thanks again. I am indeed in Quebec. The last day where winter tires are legally requires is March 15th. The law also states that when taking delivery of a new vehicle there is a 10 day exempt period. Thatís probably why the dealer delivered the vehicle this way. It is the first time I have driven on summer tires this early in the year so it makes sense now. To be honest I didnít think it would have such an effect. Itís defintiely good to know. Luckily the temps are rising this week.

Thanks for all the suggestions we will see how it goes.
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