My 2019 C300 Coupe Sport Package has recently started “bucking” when put in gear (both forward and reverse) when given gas. It doesn’t do it every time you start the car and it only does it for about 3 seconds (approx. 4 “bucking” motions)

 

Never gotten it in reverse, but after a cold start will feel a couple mild bucks when in Comfort if going up a hill. Pretty isolated and rare for me though.

 

I'm in Louisiana, what's a hill?! Lol. It doesn't do it often but it's done it a few times.

 

My 2017 Edition 1 has done this a few times. Same symptoms....while going up a slight hill and over a speed hump after pulling out of my driveway. I take my foot off the gas and it finally stops.