Since July of 2011 I have been driving my Volt alternating between D and L thinking that the much faster slow down in L was the result of more power being sent to the battery. Also, for some reason, I assumed the mechanical brakes were 100% separate and disconnected from the regenerate braking (electrical) system, i.e. if I pushed on the brake pedal, that action would activate the normal brakes, along with the computer trying to slow down the car by turning the electrical motor into a generator. Up until about 8 months ago, when the car had around 97,000 miles on it, EVERY time during that last 8 year period I let my foot off the accelerator, whether in D or L, the car slowed down - much more in L. But recently during the first few miles each day, the car does NOT slow down when I take my foot off the accelerator - in D or L. I thought something was wrong, and after several trips to the dealer, I was finally told it was functioning normally. Sometimes the computer decides to open the current, that is, NOT turn the electric motor into a generator. When this happens it may feel like the computer shifted the car into neutral where the regenerative braking would not engage. The "problem" I experience always "corrects" itself though. In addition to this, the dealer told me the my way of driving, shifting from D to L or simply driving in L, was not what was intended. Also, they said when you depress the braking pedal with whatever force, the computer decides whether to engage regenerative braking or the regular brakes or some kind of combination of both - depending on how hard I press the brake pedal presumably. And here is the kicker, they said there is a dump coil or two or three or four to which the power from the regen system could be diverted if the computer decided not to send the power back to the battery for some reason. When I asked why the car had NEVER behaved, in the first 8 years, by essentially shifting into neutral when I released the accelerator, they could not say. Sorry for the long post, but I wanted you all to have as much information as possible. Has anyone experienced this? Does anyone have technical expertise about exactly how all this works on the first generation Volts? Thanks!