2017 Model S scroll wheels are slow to respond / intermittent

[DavidZemon]

When we first got the car in September of 2020 with its original MCU, I was frequently annoyed with how many clicks I'd have to spin the scroll wheels before a single click was recognized. Slow scroll, fast scroll, didn't matter. It seemed like only 1 out of every 3-5 clicks would actually get recognized.
A few months later, I paid for the MCU2 upgrade and the issue drastically improved. A fast scroll would still skip many clicks, but every click was recognized so long as I moved the wheel slowly.

A month or two ago, things got worse again. It seems to be related to a software update, but it's been long enough now that I couldn't say for sure. But we're back to lots of scroll ticks getting ignored even if I move the wheel slowly and deliberately. It's a very frustrating experience.

Anyone else running into this? Is there anything that can be done? Rebooting the MCU by holding both scroll wheels did not improve anything.

Both left and right wheels behave the same. Pressing either wheel gets recognized immediately - it's only spinning them that is problematic.

 

[richrootes]

I’ve had some weird glitches like this in the past which were fixed by a ‘factory reset’. I know it’s inconvenient to have to set things up again, but it’s worth a try - saves a lot of hair pulling!

 

[Rascoe]

When we first got the car in September of 2020 with its original MCU, I was frequently annoyed with how many clicks I'd have to spin the scroll wheels before a single click was recognized. Slow scroll, fast scroll, didn't matter. It seemed like only 1 out of every 3-5 clicks would actually get recognized.
A few months later, I paid for the MCU2 upgrade and the issue drastically improved. A fast scroll would still skip many clicks, but every click was recognized so long as I moved the wheel slowly.

A month or two ago, things got worse again. It seems to be related to a software update, but it's been long enough now that I couldn't say for sure. But we're back to lots of scroll ticks getting ignored even if I move the wheel slowly and deliberately. It's a very frustrating experience.

Anyone else running into this? Is there anything that can be done? Rebooting the MCU by holding both scroll wheels did not improve anything.

Both left and right wheels behave the same. Pressing either wheel gets recognized immediately - it's only spinning them that is problematic.

I had that the other day after a software update. I did the 4 finger reboot (press both scroll wheels and the buttons above the scroll wheels at the same time until it restarts) and it fixed it for me. It has not returned. I did not have to do a factory reset, which I was very happy about.

 

[DavidZemon]

Thank you both for the replies. I haven't tried the 4-finger reboot in a long time, so I'll give that a go next time i get in the car.

 

[phiberoptiks]

I recently noticed this as a new problem as well. I'm sure it's software related. I can't seem to fix it. Sometimes rebooting helps and other times it makes it worse...

 

[COS Blue]

I tried the 4-finger reboot a couple of times and it did not help. Then I got mobile service to come out and replace the switch assemblies (includes scroll wheels and the buttons surrounding them). My service guy said that they've had issues in dry climates due to static electricity, and he seemed confident that this would fix it. It did not. So, I fear it is indeed software related.

Service guy suggested I gather timestamps of when it's happening and submit a service request, so that it can be remotely diagnosed. So, I'll try that, but I'm not optimistic.