Scott Disick Lawsuit -- My Mercedes Has NO Class

Scott Disick claims he was taken for a ride by Mercedes Benz, which sold him an insanely expensive car that is as reliable as Lindsay Lohan on a movie set.

Kourtney Kardashian's baby daddy has filed a lawsuit against the auto company, alleging the 2012 Mercedes-Benz SLS AMG he bought breaks down so much it's "virtually useless."

Disick says the only people who can admire the car are mechanics in the repair shop -- because that's mostly where it sits. And to add insult to injury ... the sticker price for a new one is $190K. He doesn't say how much he paid.

Disick claims MB has failed to make the car roadworthy after numerous attempts, so he wants his money back, plus expenses, plus anything else he can get for his troubles.