The idea of the "Easter Egg" has been around for decades now, with manufacturers hiding all manner of features or sketches in various hard-to-find parts of their cars, for no other purpose than to bring joy to the person who finds them. Most of the time, they're nothing more than drawings or hidden references, but in a few cases, these Easter Eggs can even be used to play tricks on other passengers (looking at you, Tesla).

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The range of Easter Eggs in new cars is surprising, as they can be found on plenty of models that most people wouldn't expect to come with hidden features. American manufacturers seem to be leading the way in the inclusion of Easter Eggs, but they're far from the only ones, as German manufacturers, the Brits, and even the South Koreans seem to be secretly hiding fun little extras for drivers to find. Let's take a look at ten of the coolest that can be found in new cars today.

10 Tesla Model S - 007 Mode

The first Tesla, the Roadster, was based on a Lotus Elise, which is perhaps why the Model S contains a Lotus-related Easter Egg hidden in its infotainment system. To access it, hold the Tesla logo on the touchscreen, and type in '007' when prompted to enter an access code.

The famous Lotus Espirit submersible from the James Bond film, The Spy Who Loved Me, will then appear on the screen. The "Depths" menu that then follows can be used to adjust the car's air suspension, with the car squatting lower the deeper the submersible Lotus is asked to go.

9 Jaguar E-Pace - Jaguar and Cub

In the corner of the Jaguar E-Pace's windshield, it's possible to make out the outline of a Jaguar followed by a cub. The same design also appears in the puddle lights that illuminate the ground below the doors when the driver is entering the car.

According to Autocar, the reason for these big cats appearing on the car is to represent the relationship between the E-Pace and its bigger, faster sibling, the F-Pace. The cub represents the E-Pace, and the larger cat represents the fully-grown F-Pace.

8 Jeep Gladiator - 419

Take a look inside the rear left of the Jeep Gladiator and drivers will find a heart symbol next to three digits: 419. That might not mean too much to anyone who's not familiar with Ohio's area codes, but it's in fact a subtle nod to the Toledo factory where the truck is built.

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The factory has a 419 area code, hence its sneaky inclusion on the rear of the truck. The Gladiator also has several other Easter Eggs to find, including a small drawing of a Willys Jeep hidden on each of the truck's wheels.

7 Genesis G70 - Logo Puddle Light

Puddle lights are a very useful innovation, allowing drivers to see if there's anything that they don't want to step in as they walk up to their car. They're also a great chance for manufacturers to add their own personal touch to greet the driver as they arrive.

Most Genesis models, including the G70, have a puddle light that displays the Genesis logo on the floor next to the car. The inclusion of a logo in puddle lights isn't a new idea, however, as it's been a popular modification among Land Rover owners for years.

6 VW ID.3 - Pause And Play Pedals

VW are relying on their range of ID cars to help them transition from internal combustion to electric power, and the ID.3 is currently the smallest model in that range. Perhaps in an attempt to give the car some character to separate it from its many rivals, VW included a "play" and "pause" logo on the accelerator and the brake.

It's not a new idea, however, as the European-market Renault Twingo RS already pulled the same stunt several years ago, putting a pause logo on the clutch pedal and a stop logo on the brake pedal.

5 Jeep Renegade - Ciao Baby Spider

The Jeep Renegade is another car that's full of Easter Eggs, but one of the easiest to spot is the spider hidden by the fuel cap. It greets drivers in a hybrid of Italian and English, with a speech bubble saying, "Ciao baby!"

It's been speculated that this is a tribute to the car's Italian-American roots, with it having Jeep heritage but being manufactured in Italy. Or of course, it might simply have been that one of the design team was bored one day, doodled something, and the idea stuck.

4 Volvo XC90 - Hidden Spider

If finding a spider in the fuel cap wasn't enough, Volvo decided to take things one step further with the XC90 and actually hide one inside the car. Look inside the storage bin in the third row and passengers will be greeted with this friendly-looking spider, complete with his own web.

It's thought that the Easter Egg would have been implemented when the car's designers needed a way to strengthen the lid, so reinforcement ribs had to be added. But, rather than make them into a nondescript pattern, the Swedes chose to add a friendly spider to every XC90 instead.

3 Ram 1500 - Center Console Math

Hidden in the storage compartment under the armrest in the center console of the Ram 1500 is an unusual feature: a math help sheet. It features several conversion charts, including a standard-to-metric wrench conversion chart that, while unlikely, could come in handy for anyone wanting to work on their truck themselves.

There's also a fraction-to-decimal chart and, inexplicably, Pythagoras's Theorem, just in case anyone fancies doing some extra math while in their truck. It might not be very useful, but it's a fun hidden feature nonetheless.

2 Jeep Renegade - Taillight Logo

Another clever Easter Egg hidden in the Jeep Renegade can be found in the car's unusually-shaped taillights. Look closely right in the center of the light and a seven-slot grille and headlights can just about be made out.

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This is of course a tribute to the iconic Jeep design that's adorned the brand's cars for decades, although it seems a bit ironic considering the Renegade shares its platform with the Fiat 500X crossover and not any of the rest of Jeep's range.

1 Tesla Model 3 - Fart Mode

Long road trips can get very dull, so why not play a prank on your passengers while cruising down the highway? The Tesla Model 3 lets drivers pick a seat of their choice to make a fart sound, courtesy of the central infotainment screen.

The fart sound can either be initiated on-demand via a button on pressing the left steering scroll wheel, or it can be initiated when the driver puts on the turn signal. Either way, it's certain to cause embarrassment for an unsuspecting passenger, especially if they aren't aware of this Easter Egg themselves.