C200 W203 no crank no start when warm outside
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Joined: Oct 2024
Posts: 7
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c200 w203
C200 W203 no crank no start when warm outside
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.
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.
Member
Joined: Jun 2024
Posts: 191
Likes: 58
E320
It seems like you might be facing an issue related to heat affecting either the starter motor, its solenoid, or the associated wiring. When temperatures are high, resistance in electrical circuits can increase, sometimes exacerbating weak connections or marginal components. A common culprit in such scenarios is the starter solenoid, which may not engage properly when it gets too hot, possibly due to internal resistance changes or minor flaws in the solenoid mechanism itself. The fact that your car starts immediately when connected to another running vehicle suggests a potential voltage drop issue or inadequate current supply under specific conditions. In terms of diagnostics, you'll want to check the Starter Control Module for fault codes. This will help identify any issues with the starter circuit or related components. A full system scanner like the youcanic will allow you to access various control units to get a comprehensive understanding of any underlying problems. Avoid using a basic scanner like the OBDLink MX+, which is typically limited to reading engine and emission-related codes and might miss intermittent issues in other systems. Have you also inspected the starter relay and checked the integrity of the battery cables to ensure they are providing a strong and reliable connection?
