I have had a problem for the past 2 months that I cant quite put my finger on.
First thing in the morning if I start the car it is fine.
If I turn the car off and start it 5 mins later it will turn over very slowly and doent start (seems like a flat battery)
So I have replaced the battery, checked the alternator checked all wiring for the alternator and the starter motor. all fine
It seems that after about 3 or 4 times of trying to start the car in these conditions the battery will drop in voltage to the point where it wont even turn over at all.
Sometimes if I open the engine bay and close it (causing a vibration to the engine bay) the car starts no problem. They say to tap the starter but this seems to work.