While you are taking time to look at that filter you will see the blower motor & mounted to it is the electronic blower regulator..that is the most likely problem..

That filter should be replaced every 45K miles on that car..under hood, under the air intake plenum

__________________
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