my sl2 has none of those walke the differences between it and the sl1 is adjustable headrests and a 16 valve motor with 124 hp vs. 8 valve motor with 100 hp. Probably the motor is where the difference is had. Still though forget working on the mpg its just not working rather I have benn ecomodding my house, which so far has been succesful. (success story to follow)
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