A Slingshot was supposed to be my first purchase of an American made vehicle and my ultimate (within reason) dream vehicle. For the last year I had been waiting for the new 2020 SS model R to be in the showrooms. A few weeks ago I finally made it down to a dealer to check it out and make a purchase of a manual transmission Model R in any color available. I didn’t care what color they all look amazing. As I was waiting for a sales representative I noticed an orange 2019 SLR sitting in a dark corner of the sales floor. I went over to check it out. Long story short instead of dropping over $30,000 USD on a 2020 I purchased a demo model 2019 with a considerable discount. It had just under 350 miles on it. The dealer said it was briefly used as demo model for test rides. I couldn’t believe the “briefly” part seeing as it had 347 miles on the digital odometer. That’s allot of test rides. I took it for a short test ride around the neighborhood and quickly on and off the highway. Everything seemed to be working fine. But I was then on the fence about getting a 2019 or 2020 so I was going to leave empty handed. So they knocked another 1k USD off the price and gave me $300 USD off the extended warranty to get me signing and driving out of there later that day. They did an oil/ filter change, put on a new rear tire and quick inspection that day free at the 351 mile mark. I think that I still need to have it done again at 500 mark for the warranty though. Anyway, I have put on another 50 or so miles over the past few weeks (it’s been raining every weekend otherwise it would be more). Every time I go for an extended period of time in high gears and need to stop at a light the engine stalls. I’m switching between 3rd, 4th and 5th gear going between 45-65 mph so I’m not at a constant speed (for break in according to manual). I’m also slowly going down to gears as I’m slowing down and not skipping gears. When I finally come to a stop it stalls. Every time. Sometimes before I’m even fully stoped. Yes I know how to drive a manual. I spent most of my life living in Europe were all the affordable used cars and cheap rentals are manual transmission. It starts right back up but it’s very embarrassing when your driving an attention getter vehicle. Now I’m thinking that I made a big mistake buying a demo model. The people who test drove it probably beat the bloody crap out of it and didn’t follow the break-in procedures according to the manual. I have already taken it back to the dealer. The mechanic took it out then it was in the maintenance bay for awhile. They came back and said there is nothing wrong with it. On my way home it happened again twice but only after driving in the high gears for an extended period of time. About 30-45 minutes. Is this typical for a new American engine? I have no idea. All I know is when I take it back to the dealer again I need to know what I’m talking about. I cant get a trade-in for another new 2019 because they are all gone. This was the last one. Also now I can’t even trade it in for 2020 because my fiancé has already planned to spend the almost 10k USD I saved on our wedding in August 2020. We were planning on leaving the wedding in the SS and driving it to Alaska for our honeymoon. Her parents are in bad health so it can’t be postponed even for COVID 19. I’m hoping some veteran SS owners on this forum can help me out. How important is the break-in period because I know for at least 350 miles it wasn’t properly followed. The dealer let me take it out without a sales representative. All they did was check my license and handed me the keys and said “have fun”. So other potential customers they probably did the same. People who test drove it probably floored it, went over 70 mph and engine braked by down shifting hard into every corner and stop. All things the manual says not to do. Also why would they need to replace the rear tire after just 350 miles? At the time I thought GREAT a new rear tire. Now I just picture people doing donuts in parking lots with my dream vehicle. Is this a lemon or is this the consequences of test drivers not following the manuals page 58 guidance on Engine and Drivetrain Break-In? Please someone help me out. Cheers.