Hello, I have this problem for about month.

My C200 W203 y2005 wont crank after running local distances (3-5 mins) when its in the sun and outside is hot.

In morning, or when it's raining/cloudy, or not high temperature, its all ok.

When issue happens, I connect it to another car that is running, it starts without hesitations.

I had battery, ECU and fuse boxes tested, everything seems ok.

I searched this forum a lot, couldn't find the same symptoms.

Thanks a lot,

Nedim.