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The transmission automatically selects Sport mode.


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Howdy, folks!

Okay, I'm stuck on a new issue and was hoping someone could be able to shed some light on it for me.

While driving my C350 3.5, I've recently noticed that Sport Mode switches on from Economy mode without my intervention. When the Sport button is pressed, a dashboard indicator light and a S sign light up. I have to pull over, turn off the engine, then restart the vehicle before I can turn off the switch again.

Fault with the electricity or the machinery? I'd be grateful for any help you could provide.

Preemptive appreciation

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My battery has worked good, starting the vehicle every time on the first try with no additional issues; but, when I plugged it into the OBD machine, I received two error warnings. Unknown Code P220101 and Coolant Thermostat (Temperature Below Thermostat Regulation Temperature) Code P012800

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