Mercedes: mercedes 300 SEL, mercedes benz 300sel, climate control unit

Question
90 MERCEDES 300 SEL 178,000 SAN ANTONIO,TX..
A/C BLOWER SUDDENLY STOP BLOWING. AC COMPERSSOR IS STILL WORKING, CHECK FUSE ON BLOWER, IS OK. CHECK FUSES IN PANEL, IS OK. ANY HINTS ON WHERE TO LOOK.   THANKS

Answer
Best guess:

A/C Blower Motor
Blower Regulator
Climate Control Unit

Climate Control:
http://www.mercedesshop.com/shopforum/showthread.php?t=142408

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1990 Mercedes Benz 300SEL
Part: Blower Regulator
 Note:  
Referred sometimes as the"porcupine".     
R2022-61960 Blower Regulator Behr IN STOCK $445.39  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1990 Mercedes Benz 300SEL
Part: A/C Blower Motor
R2031-16694 A/C Blower Motor and Fan Behr IN STOCK $343.26  
 
R3010-50545 Heater Motor no Fan Bosch IN STOCK $150.49  

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

Vehicle: 1990 Mercedes Benz 300SEL
Part: Climate Control Unit
-----------------------------------------------------
   Climate Control Unit
Rebuilt : Fahrenheit
Push-button Assembly
Calibrated in Fahrenheit.      
--------------------------------------------
   Climate Control Unit
Rebuilt : Celsius
Push-button Assembly
Calibrated in Celsius.      
---------------------------------------------
   Climate Control Unit
New : Celsius
Push-button Assembly
Calibrated in Celsius.  

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...