W124 300CE poor starting

[Mike Wilkins]

-- it catches then stops. Needs to be spun on the starter for a second or two. It never lets me down but is a nuisance.
Is this indicative of anything in particular ??
Thanks
Mike

 

[grober]

Possible a delay in establishing a good FUEL SUPPLY- could be a partly blocked fuel filter or a problem with a sticky fuel pump relay.

 

[Mike Wilkins]

This has become more of a prob - had to call RAC recently. Was easily started with a squirt of brake cleaner having removed the breather hose on top of the filter case. RAC man recommended cleaning a diaphragm in the throttle body - any ideas ????
Thanks
Mike