The Model S is the first fully Tesla-built car from the innovative California electric vehicle maker, following the Roadster, which had relied on an external body and chassis maker.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

The Model S initially launched in 2012, and has become more refined in just a few years.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

Recently, Tesla revised its Model S offerings to the 70, 70D, 90D and P90D.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

This example is the 90D, which has a 90-kilowatt-hour battery pack and two drive motors, for all-wheel-drive.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

The 90D represents a significant upgrade from the original Model S 85, adding range and all-wheel drive.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

The Model S packages its battery pack, made up of lithium ion cells, in the chassis.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

The 90D gets two electric motor, each making 259 horsepower, front and back. The total horsepower output comes to 417.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

Being an electric vehicle, the Model S has no tailpipe emissions.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

An optional air suspension contributes to comfort and handling.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow

The power steering and climate control are, of course, electric.

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Because of the unique nature of an electric drivetrain, you can set the car to creep when you aren't touching the accelerator or brake, or stand still.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow
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The 90 kilowatt-hour battery pack gives the Model S 90D a range of 288 miles.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow
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The Model S is designed for exceptional aerodynamics and light weight, to maximize battery performance.

Published: / Caption: / Photo: Wayne Cunningham/Roadshow
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The EPA rates the Model S 90D at 100 mpg equivalent for a combined city/highway cycle, a testament to the electric drivetrain's efficiency.

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The air suspension automatically lowers at speed to improve aerodynamics.

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The electric motors are much smaller than an engine, leaving room under the hood for cargo.

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The hatchback allows versatile cargo space.

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It takes hours to charge up the Model S 90D from a Level 2 240-volt charging station, but Tesla's free Superchargers add 170 miles of range in half an hour.

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A panoramic sunroof is a nice touch for the cabin.

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The cabin, lacking a transmission tunnel, is very spacious.

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Rear seats easily accommodate three.

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Tesla keeps its dashboard relatively bare, using the touchscreen for most functions.

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The steering wheel holds volume controls, and a stalk activates driver assistance features.

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The new AutoPilot feature keeps the car in its lane and maintains distance from traffic ahead.

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This instrument cluster display gives you confidence that the Model S is tracking traffic around it with its sensors.

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Turn-by-turn instructions show up on the instrument panel.

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In stop-and-go traffic, the Model S can pretty much drive itself.

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The 17-inch center touchscreen shows audio, navigation, phone and vehicle settings.

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A 4G/LTE data connection pipes in Google Maps.

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Large settings screens make it easy to learn more about what the Model S can do.

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The AutoPilot settings screen lets you fine-tune how the self-driving feature works.

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Tesla builds in two apps for streaming music, Slacker and TuneIn.

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For navigation, the Model S offers one-box search through Google Maps.

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The Model S can play streaming audio through a Bluetooth connection to your phone.

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The Model S lists nearby charging stations, including its Superchargers.

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If you really want to geek out, you can track your electricity usage.

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