I know the timing chain and rails on my W108 is something that needs revision.

Is this the same for W116s? I just got an euro 450SEL and don't know much about this car.

Also, Does anybody know a place near Orlando that can check and refill my AC with R12?

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1972 W108 280SE 4.5
1977 W116 450SEL
1981 E12 528i BMW