I would go ahead and replace the OVP completely first. It fails internally and if its original, it is time. (AVOID ALL URO PARTS -- Documented garbage)

Since you are new to the car, do not jump start the car with a boost charger or jumper cables with another vehicle, ever. This destroys the OVP and MB has made note of this in bulletins. I recommend owning a portable battery, just plug it in, turn it on and start car since it only acts as another battery, and not a boost charger.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k