Mercedes Benz repair: hot running mercedes, number search results, fan clutch

Question
My 1987 Mercedes 260E is running hot. I changed the water pump and thermostat. It is still running hot. Can the timing cause it to run hot? How do I change the timing? I have a timing light.

Answer
Plugged radiator, auxiliary cooling fan failure, failed Fan Clutch, leaking head gasket, fuel dumping = overheating catalytic converter or air pockets = incorrect filling/bleeding.
To eliminate air pockets, disconnect heater hose from engine, and fill cooling system until coolant runs out of engine heater fitting.
Timing alone will not cause overheating.

http://catalog.mercedesshop.com/

There are two possible Fan Clutch units.

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1987 Mercedes Benz 260E
Part: Fan Clutch
 Note:  
Earlier versions of M 103 engines except 103.942 will require (1) 103 200 04 23 fan.     
 Engine: 10-017337-
 Product   Brand   Availability   Retail   Our Price
G5010-14302 Fan Clutch Behr IN STOCK $151.98  
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PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1987 Mercedes Benz 260E
Part: Fan Clutch
 Note:  
Earlier versions of M 103 engines except 103.942 will require (1) 103 200 04 23 fan.     
 Engine: 12-037141-
 Product   Brand   Availability   Retail   Our Price
G5010-14302 Fan Clutch Behr IN STOCK $151.98  
  
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1987 Mercedes Benz 260E
Part: Radiator
 Note:  
 Product   Brand   Availability   Retail   Our Price
 G1000-31098 Radiator Behr IN STOCK $180.32  
 G1000-31098 Radiator Nissens IN STOCK $180.32

There are two possible Auxiliary Fan Assembly.

 Chassis: A 906405-
G5000-35770 Auxiliary Fan Assembly Bosch IN STOCK $412.20

 Chassis: -A 906404
G5000-11755 Auxiliary Fan Assembly ACM IN STOCK $196.91  
G5000-131942 Auxiliary Fan Assembly Bosch IN STOCK $194.94