I took my new to me 2018 SFS on a road trip this past weekend. Twice while going downhill with cruise control on, the tach showed over 5k. It should’ve been basically coasting and maybe braking but as soon as I turned off the cruise, it went immediately back down. It scared me and luckily the first thing I thought to try corrected it. With no other problems on the trip, it seemed like a fluke but when it happened twice, that’s an issue. The car only has around 3500 miles and is a certified preowned corporate car. Does anyone have any insight? Thanks
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