Mercedes Benz repair: hard starting when cold, mercedes benz 190e, number search results

Question
Hello, I have a 90 mercedes 190e 2.6 w/ 190k with hard starting while cold only once it starts if I turn off key and try again it starts ok, maybe cold start valve where is this located also going to replace oxygen sensor and fuel filters any advice? thanks greg

Answer
Intake manifold, te following link is a picture of it.
http://catalog.eautopartscatalog.com/mercedesshop/sophio/image.jsp?title=Cold%20...


Other possible issues:
Air Temp. Sensor
Altitude Sensor
E.H.A. Valve
Fuel Injector
Fuel Injector Seal
Water Temp. Sensor
Fuel Accumulator
Fuel Filler Neck Seal
Fuel Filler Restrictor
Fuel Filter
Fuel Pump
Fuel Pump Check Valve
Fuel Screen
Fuel Tank Vent Valve



PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1990 Mercedes Benz 190E 2.6
Part: Cold Start Valve
C4000-25386 Cold Start Valve Bosch IN STOCK $169.58

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...  
  
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1990 Mercedes Benz 190E 2.6
Part: E.H.A. Valve
 Note:  Bosch 3.437.010.040
Mounted on fuel distributor.     
C2030-19800 E.H.A. Valve Bosch IN STOCK $272.40  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...