'Would it be weird...' The one request behind Kim Kardashian's $600K custom Mercedes van on Million Dollar Wheels

When you've got a billion dollars to your name, you might as well spend it.

That's exactly what Kim Kardashian did when she splashed US$400,000 (AU$600,000) on a custom Mercedes-Benz V-Class with Maybach gear, which you can see in an episode of Million Dollar Wheels.

Stream Season 1 of Million Dollar Wheels for free on 9now.

Dubbed the "first of its kind in the US", Kim's custom car has all the luxurious bells and whistles you'd expect from a mega mogul – designed for "school drop-offs" (because why not) with one very specific 'Kim K' request.

Catch a glimpse of the epic new series in the videos above.

The man behind the six-figure deal was elite celebrity car dealer RD Whittington, who in the world of luxury LA super cars admitted that Kim Kardashian remains their biggest client to date.

"Kim is a mega car collector," he explained. "She has every car you could imagine – and multiples."

The Mercedes V-Class is low-key on the outside (to help the star "roll under the radar" if you will). But inside, it looks like a jet.

Catch a first look inside Kim's custom Mercedes in the clip below.

"This is the only car she doesn't have yet for her fleet," RD continued.

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"We've been working around the clock to make this happen," RD told Kim.

The unique ride was packed with "insane" features.

In-between the two passenger seats sat a touch pad that could do everything; from making a in-built flat screen TV appear, to changing the lighting in the car.

The panel also allows for the passengers to change the partition from clear to opaque in just a click of a button.

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While it was time for his client to check out her new wheels, Kim K had one very specific request...

"Do you think it would be weird... I kind of just want everything all grey," Kim suggested.

She wanted to change the car's colour match the rest of her grey "fleet".

"I just brought her a black van that is completely custom and ready to go, and now she wants to change the colour and paint it grey?" RD told cameras.

"Is this a problem? Absolutely not."

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The work never stops for RD and you can see what other changes Kim requested in the clip above.

This isn't the only A-list celebrity on RD's client list. Follow the world of LA super cars on Season 1 of Million Dollar Wheels on 9Now.

Stream Season 1 of Million Dollar Wheels for free on 9now.