That is a great diagram, HOWEVER the electronic blower regulator is mounted to the blower motor INSIDE the car. The passenger side underdash panel must be removed to access the blower motor & regulator on the W210 chassis.

__________________
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