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Guys, anyone with knowledge of Audi's, I need to add coolant to my A5 but I seek your advice and knowledge first. I'm on the verge of getting some Beck/Arnley coolant from O'Reilly's but would the normal Prestone premixed stuff work? Most of what I'm seeing online doesn't say anything about a specific brand. Should I just take it to the dealer and have them top it off/see if there's a leak anywhere? (It's under warranty). Coolant levels at about 50%, which seems wayyyyyy too low for nothing to be going on.
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