Do it. Its cheap and easy. And like I said before, even if that's not the actual problem, it might be like a tune-up for your climate control, making it work a little better

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Streetside: 1987 Mercedes 300E Petrol Blue/Green
2014 Ford Mustang Grabber Blue
1999 Ford Ranger Green

Dockside: 1968 Eltro 17
1985 Silverton 34C