The trans doesn't come with a dipstick. So you would need to buy a special tool to check it.

Doubt if the trans would make noises & then go away.
Possible a worn trans mount OR motor mount would cause that.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator