cmpcpro

Hey guys I've mentioned before when the car has been warm and then turned off and then started again after a minimum of 5-10 minutes or longer I will periodically get a clunk the second the car actually fires. At first I felt it in my feet on the floorboard and then today I thought I felt it in the steering wheel.. sometimes it's hardly anything sometimes it's pretty noticeable and tonight for the very first time it was more than just one clean thunk, but one louder clunk and a second lighter clunk... again it happens only when warm and the instant the car fires after turning over it happens.. after tonight and it made the rebound clunk I started to wonder if it could be the cat or something in the exhaust.. or even a mount or something however my MB guy said he checked the exhaust but I think he was just checking it for any rubbing as when the car is cold sometimes I'll feel a very very tiny bit of vibration in the floorboard at a certain RPM.. keep in mind I am extremely **** lol so I can pick ten problems out whenever I buy a brand new car..

alexanderfoti

Very likely engine / Gearbox mounts.

cmpcpro

They are all brand new. It did it before and after. The noise seems to go from front to back periodically.. I'm wondering if it could be exhaust or something in the ABC

alexanderfoti

Aha fair enough.

Possibly. Get somebody under the car whilst you start/stop it and see if you can see it.

Its possibily ABC but I would be surprised.