bad smell

I've had that problem with an older car and that was because the air filter needed to be changed out. With new cars, I assume it's because the deposits of sulphur and hydrocarbons that builds up in the catalytic converter are being burned up. Heard this happens when you usually drive your car slowly and the odd times when you put the pedal to the metal, it burns up the deposits built up.
This is just my guess.

Sulfer in the gas. Try a different brand of gas.

Bebop said:

Sulfer in the gas. Try a different brand of gas.

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I recently switched stations, so I will give that a try. thank you

If you don't notice any difference from switching octanes/brands you may want to look into some fuel additives. Most of them are pretty cheap and should help aid in removing any old buildup.

There are recent reports in the media about an unpleasant smell associated with Hyundai's Palisade SUV-s. the smell is described as "checmical, with a tinge of garlic".
This woudl be more noticeable if the car sat with the windows closed in the heat. Possibly attributed to some plasticiser additives inside or around the seats.
Could it be something like that?

Could be exhaust related. Look for an exhaust leak esp. around the joints in the exhaust system.

donaldjrhome said:

Just got an 18 KONA with the 2.0 and I love it, the problem is when cold and jump on highway I get a rotten egg smell for a bit. Dealer says no problem he can find. Anyone else notice this?

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Thats not uncommon.. especially with a Rich fuel mixture.. As long as it mostly goes away when it reaches normal operating temps.. your fine.. even under normal conditions, it not uncommon to get a whiff Of catalyst odor when accelerating from any unburnt fuel..