I’m newbie. I own a 2016 E63S AMG Race IQ tuned to about 750. Just bought the old lady a 2019 touring and need help on which tuning direction to go. I’ve heard of JB4 and Hondata. Anything else and which one out of the 2?
Welcome to the forum. Post some pics when you get a chance. I can't help with your tuning question but can offer it's a good idea to never call the best half the old lady, especially if they are within ear shot.