This wasn't much of a run, but I haven't had much street action as of late. My car is a 15 E63S, stock except for lighter brake rotors. I got to a redlight next to a black Hellcat Charger, and looked over to see if he wanted to run but his windows were up and tinted. I just took off like normal and so did he. We were next to each other and at around 40 he hit it. I wasn't really prepared and was one gear too high in 3rd, but we stayed dead even until 100ish and we both let off for the next light. He dropped the window, gave a big thumbs up, and said he didn't know there were any Mercedes sedans that were a quick as him. I asked if he had anything done, but he just kept smiling. I asked if he wanted to go at the green, but he shook his head. I gave him a thumbs up back and we puttered away, he turned into a neighborhood pretty close to the light. I know it was lowered, and had at least a new catback. Tips were black and it was damn near deafening even with my windows up. Couldn't make out the tire type but didn't look like PZeros from the tread pattern, looked R888ish? Stock 5-spokes. Based on the result I doubt anything else was done. Would love to run one in the right gear and to a little higher speeds, I know both cars have long gearing and my car seems to accelerate faster at 100+. After he turned, my wife said "Wow, I thought this car was quicker than some Dodge." Sounds like she's implying I should get it tuned!