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2013 Limited. Car runs just fine. Had too much time at hand today and took a look and was astonished. The reservoir is bone dry. I put a flashlight against the white plastic reservoir and cannot find any indication where the fluid level is. Instantly feels uneasy about driving the car now. A few questions, hopefully somebody with experience can help.

1. Where to get OEM coolant? The dealers nearby are all blood suckers, asking $80 for oil changes. So need some help here. I know some would say Pentofrost A3 is the same stuff, but is there anything official, trustworthy evidence for that?

2. How to take off the radiator cap? I twisted about 1/4 turn and pulled it up. However, there seems to be some metal clips to hold it. I did not want to risk anything so I stopped. Is there any tricks?

3. BTW, what is the use of that black plastic strip in the window washer fluid reservoir? I can easily take it out of the reservoir. So pretty puzzled.

Thanks for the help.