Thanks,

The reason I am planing to replace is that the fins are pretty damaged in front - no leaks though. Of course I will be flushing every part of the system I retain.
It is the car in my sig, and we do plan to tint.....Just wanted to maximize my cooling capcity while I have the system apart.

I welcome other thoughts on the points vstech brought up....

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Current Mercedes
1979 maple yellow 240D 4-speed

Gone and fondly remembered:
1980 orient red 240D 4-speed

Gone and NOT fondly remembered:
1982 Chna Blue 300TD

Other car in the stable:
2013 VW Jetta Sportwagen TDI / 6-speed MT