Keeps blowing starter fuse (for my grandpa’s car)
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Joined: Sep 2025
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2008 c350
Keeps blowing starter fuse (for my grandpa’s car)
Good morning. Just joined on here to try and find some ideas OTHER than just googling and searching because I am not sure if they all would really apply.
So, my grandpa has a 2008 C350 with 2,800 miles on it. He only takes it out once or twice a year, just how he is. He has the battery plugged into a battery maintainer, and garage kept with a cover. However, the past 2-3 years, he runs into an issue where it blowes the starter fuse (#7). We replace the fuse.. It starts… then a month or 2 later, goes to start it and blows the fuse again.
He is in Seattle, I am in Ohio.. so nothing something I can really attend to constantly but I did have him change the oil at least and told him he should start it 4-6 times a year and let it run for 5-10 min just so things don’t become stagnant.
I did replace the relay as well with an OEM relay, but still continues to blow the fuse. Wanted to see if anyone else has had similar issues because I cannot imagine that it could be the SAM since it has such low mileage. I will be going to visit for 3-4 days at the end of the month and want to try and find something for him. I was thinking it could just be a dry/dead spot on the starter since it isn’t used much… or corrosion/oxidation of the cable… but any other ideas?? Much appreciated for responses.
TIA
So, my grandpa has a 2008 C350 with 2,800 miles on it. He only takes it out once or twice a year, just how he is. He has the battery plugged into a battery maintainer, and garage kept with a cover. However, the past 2-3 years, he runs into an issue where it blowes the starter fuse (#7). We replace the fuse.. It starts… then a month or 2 later, goes to start it and blows the fuse again.
He is in Seattle, I am in Ohio.. so nothing something I can really attend to constantly but I did have him change the oil at least and told him he should start it 4-6 times a year and let it run for 5-10 min just so things don’t become stagnant.
I did replace the relay as well with an OEM relay, but still continues to blow the fuse. Wanted to see if anyone else has had similar issues because I cannot imagine that it could be the SAM since it has such low mileage. I will be going to visit for 3-4 days at the end of the month and want to try and find something for him. I was thinking it could just be a dry/dead spot on the starter since it isn’t used much… or corrosion/oxidation of the cable… but any other ideas?? Much appreciated for responses.
TIA
Super Member
Joined: May 2024
Posts: 505
Likes: 123
From: Northern Indiana
2014 c300 w204.080 3.5 v6
Disconnect the small wire going to the starter. If it still blows fuses you have wiring short somewhere. Most likely tho it wont blow the fuse which means the solenoid on the starter is bad.
