lately I have been thinking of getting rid of my mazda. Its got 66k and has been super reliable but I dont really much enjoy driving it but only really do so because it has air conditioning. It does have a payment which is pretty small as car payments go at 224 a month for 25 more months for a total of $5200 left on the note. I dont struggle to make the payment or anything but I could chomp say $330 a month from my expenses by selling it. I was thinking of just getting new shocks and the ac working on the 300sd and keeping only that car. Since I put the pirellis on it, the fuel economy has suffered a lot. It only gets bout 28mpg if I try and its 3 month average is 27mpg. The mercedes gets about 24 and would probably get less if I got the ac going. would it be dumb to get rid of a car that is reliable as the day is long but costs 330 a month to insure and pay for plus gas and only rely on my 28 year old diesel? The mercedes is pretty sound and hasn't needed anything but maintenance as far as reliability goes for the last year, but I dont daily drive it. I cant decide if $330 is just too measly of a payment to worry about and just keep it until it dies. your thoughts?

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual