What's this problem? Can any expert explain it?

I've got a 2020 Outlander 2.4 Zhixiang edition, and it's only driven 170 kilometers. When it's idling, there's a noticeable "da-da-da-da" sound inside the car. Can any expert explain what might be causing this?

Is it true that all Maserati GT models without a gear lever are equipped with an F1 gearbox? Could any expert explain this? Thanks a lot!

My car is a 3.0T manual, and when accelerating to a certain speed, it suddenly feels like it's slowing down. Can any expert explain why this might be happening?

When turning on the air conditioning in my 2006 Previa ACR50, I occasionally hear this sound. Can any experts help explain what's happening? Has anyone experienced a similar issue, and what could be the cause? It's a 2.4.

What dashcam is everyone installing on the Trumpchi GA8? Can any expert recommend one?

Is the 2016 2.0 Premium version set to not go faster when you press the accelerator at 120? Could any knowledgeable experts explain?

Is there any problem with the transmission vent valve oil leak on a 2018 MG ZS automatic? Asking the experts.

What's this problem? Can any expert explain it?

What's the problem? Can any expert explain this?

Which one to choose between the A6 and Touareg? Please, experts, explain.