ECU Remapping

[stealth64]

Hi,

I have a CLK 320 and want to get the engine remapped so i improve my mpg.

My question is what is the difference between this and getting the car chipped?
also where is the best place to go and which equipment should i look out for in terms of the best ecu equipment?

[Defcon5]

A re-map is tailored to your individual car, much better than a chip