Reading alot about owner who have chiped there e300s is it diificult to do your self or is it some you should have the manufacturer install,does the fuel economy suffer greatly.
Who would you go to for the best deal?

 

Basically you need to chip the car, the car will be alot more powerful. Most guys go with speedtuningusa which is what i have on my 99 e300. It's a pretty simple process just need to plan 3 days down time.