E220 92 Problems starting in the morinig

I have been driving this car for 6 years without much problem..
Sudenly one fine moring it refused to start..
Only after 15 key turns it started with a splutterd and the smoothen out ..
For the whole day it needs 3 - 4 kicks to start.
Now it has been like this every morning.
I have chaged the spark plugs, distributor wire, distributor cap and rotor. Send for timing and CO tuning.
Wonder whats wrong with it?
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Fuel injected engines have a "cold start" system. Basically, there's a temperature switch: ON when cold, OFF when warm, a relay or similar that is ON longer as the temperature falls and finally an electric valve that sprays a bit of fuel into the cold engine and so enriches the air / fuel ratio for cold starts. The valve is ON only for a matter of seconds -- just to get the motor going.
One of these parts is either disconnected or has quit.
That's what's wrong with your car.
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That diagnosis, sir, is amazing if you took it off the top of your head.

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