We just brought home a 2018 Clarity PlugIn Hybrid. On our first EV ride we marveled at the lack of engine noise. Once we ran out of battery the engine kicked in and you could hardly hear it. Then we slowed almost to a stop to make a corner. At that point the engine noise really increased and the performance seemed to go down. Sort of like driving a gas engine car in 1st gear. We stopped and a burned or burning smell developed. After an hour or so we took it back out and put it in HV (charge) mode and drove it around for a bit. Didn't sound as loud, the smell seems to be abating and it even added a little bit of charge to the battery. We're thinking the smell is just new car break-in/bake-in but the change in noise level between the initial engine turn on when there was very little load and the subsequent no EV help mode is what we are questioning. Thus the title - What-to-Expect.