Mercedes Benz repair: no spark, mercedes benz 300e, number search results

Question
I was told my prolem was the crank sensor when my 1988 mercedes 300e wold not fully crank.  I am getting no spark to my plugs and the coil only read .5-.6.

Answer
Did you replace the crank position sensor (located @ the Flywheel)?

I would replace the ignition coil, due to age failures.
A defective Overload Protection Relay may be also involved.
A bad KE control unit is possible, though not likely.

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 300E
Part: Overload Relay
 Note:  
Aluminum cover with bracket : contains (2) 10 amp ATC fuses on top .     
 Year: 1988-
P2056-18126 Overload Relay Germany IN STOCK $75.80  

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


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 300E
Part: KE Control Unit
 Note:  Federal
 Year: 1988-1989
F6002-38362 KE Control Unit Bosch IN STOCK $1259.47  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 300E
Part: Reference Sensor
 Note:  Position : @ Flywheel
F6010-51308 Reference Sensor Bosch IN STOCK $139.16  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=cata...