sander1982

I have 2004 CLK320 and want to have ECU upgrade. However, I am not sure whether it will bring a difference on performance or not after installation. Does anyone could answer this question?

If someone knows some shops or website sells good ECU chip, then please let me know. Thanks

ItalianStallion

You can get your ECU done by Kleeman, Renntech, Carlsson, Evosport (PowerChip), or SpeedTuningUSA. You will not see a major gain in hp like the supercharged cars get. At most you'll get 20hp, but that is very unlikely. These ECU upgrades all go for around 1000 dollars except for SpeedTuningUSA which is 300. I got the SpeedTuningUSA ECU and if you are addicted to hp and an extra 15 horses or so is worth it, then go for it.

sander1982

any other comments? from other people.????

rsatmans

Hello, do a search lol i did a complete write up on the speedtuningusa chip on my clk500