Battery OEM Subaru or OEM Mercedes
Have a 2020 Touring XT. Battery went bad after 5 years so that was normal. No problems other normal wear and tear, tires and brakes.
Historically, OEM Mercedes batteries are really good and last many years.
with the auto start/stop eliminator installed after 1 year of ownership (using the auto start/stop feature the first 6 months and manually disabling it the last 6 months), my 2019’s battery lasted 5 years and 160k km before it started feeling weak and was replaced as a precaution.
My 2021 with 84k miles was very similar. Even had the auto start fail to restart the car once when it was cold. I just had the battery replaced with the new larger size one and it made a huge difference.
Very unlikely to be the starter, though anything is possible. I'd put money on the battery being weak though. Voltage isn't the end all be all, you need to know about the cranking amps.
I will not trust having a Subaru battery in my Subaru cars, I only buy Walmart, Costco or Interstate.
First battery lasted about a year and a half.
The only issue I had with any of them were the shitty batteries in the first two.
My 2018 has had zero problems except for a recall for battery.
My OEM battery died in 17 months. Their replacement OEM battery died in three months.
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