No caption needed 😂😝 Also had car coded for eco mode to start in last position rather than default to "on" as it does from the factory.

 

Very cool hack! Any idea what Race mode does in a non-S? I ask because things like the E-LSD, dynamic engine mounts, suspension, and steering response on the S are programmed in conjunction with Race Mode.

 

Cool! Whatdifferences do you notice?
Who coded it?

 

Ha! Nice. How did you get ECO mode coded to start in last position? Who did this for you?

 

Got it done at Modern Mercedes Repair Specialists in Dallas, Texas... If your local, these guys are amazing, highly highly recommended... They do all my aftermarket work and routine maintenance.

I believe the biggest thing it really adds is that the car will stick in the lowest gear possible at all times -- doesn't shift down like S+ mode. I also feel like the shifts are quicker but it might be in my head, gonna follow up with the shop today to see what else the coding does.

And the eco start stop is just another coding tweak they did for me... Game changer lol.

There is a bunch of other dumb useless coding stuff they can do, but these two were really the most functional/useful for me.

 

Yeah Justin and Remington are amazing. I was up there yesterday and they were just telling me about how they just did that. I assume they were talking about your car. Please let me know if you notice anything interesting about the mode. When I bring my ride in for the service B I am going to have them code the Eco mode off and then depending on what you notice I may have them enable race mode.

 

I had RennTech add the DISABLE Eco on my stage as well.. they just coded it into my puck, so when I upload my tune, it disables it, and when I revert back too original, it is back on.

 

I was “patient zero” for the Eco start off button and it’s literally life changing to have that plus the exhaust valve boxes because I can just start the car and go. No more button pressing like I’m arming nuclear warheads just to start the car the way I want to. So glad to see so many other local Dallas guys discover Modern Mercedes and all the awesome work they are doing. The fact that it’s so much less than dealership rates really makes it a no-brainer to go with them. AMG trained techs doing mods and maintenance work at significantly less than dealership pricing? Heck yes!

 

Seriously Modern Mercedes is so clutch. Super nice shop, too 😁😁 not allowed to take pics, but ppl who have been there know.

 

Recently had them install catted downpipes with a stage 1 tune (don't think I'm ready for stage 2 yet if I'm being honest) and man.. the car sounds and feels like a whole another beast. I also had them take off the eco start button, thank god for MMR.

 

Hey any update on that “race” mode i really want to do it to my C63 I’m just worried I’d look dumb if it made no difference also have you noticed any long term differences?

 

For the PFL, since the non-S is lacking the dynamic engine mounts and electronic locking differential, it's essentially limited to the engine mapping and shift program. Race mode has a linear throttle map, meaning 50% pedal position gives you 50% throttle as opposed to S+ which overboosts the throttle response relative to the pedal position. A linear throttle response is desired on the track or other situation such as when drifting to precisely control the throttle. The transmission in Race essentially holds the gears all the way to redline and doesn't short shift with moderate throttle, staying in the lowest possible gear ready to accelerate. The manual mode in the 7MCT also seems the least laggy in Race from what I remember. Lastly, Race mode automatically puts ESP in Sport mode if I remember correctly, but you can do that manually anyway. Steering and suspension don't have a separate setting for Race mode. The steering stays in Sport, and the suspension in S+.

For the FL, it'll be a little different. The FL non-S has the electronic locking differential, so Race mode will benefit from that, and AMG DYNAMICS which is new in the FL has an extra chassis dynamics mode called Master that's available in Race mode. AMG DYNAMICS affects the power distribution on the rear axle (torque vectoring) and the steering response, but because the non-S lacks the 9-stage traction control it can't fine tune the traction beyond the differential. Like with the PFL the suspension is unaffected by Race mode and stays in S+, but steering is affected as it is controlled by AMG DYNAMICS. ESP doesn't automatically go to Sport in FL when activating Race mode, so it has to be done manually, which is required for the Master mode to actually take effect. AMG DYNAMICS stays in Pro if ESP is left fully on.

 

So it wouldn’t make a difference unless I had the 9 stage traction control reason I’m asking is I’m getting a stage 2 tune, down pipe and cold air intakes but I’m wondering if I’m lacking since I’m missing the race mode but I’m sure the flash and tune will be mapped to max out the new part and if needed take off any limiters that the factory might’ve added but now that I think about it the 4K rpm limiter while in P or N I’d pretty annoying and I want to ask the guys at the shop to bring it up to 6.5-7k rpm but Idk If that would effect my engine in any bad way and if there’s anything you think I should do to the car plz feel free to lmk I’m new and would love to know what the best things to do to this car is

 

As I said the main component is the engine mapping, but if you are going to tune it then the maps are gonna change anyway with the tune. But as far as stock tune goes, Race mode is useful if you are sensitive to throttle response. It comes down to how you are planning to drive the car. For example I use Race mode in the canyons, because I dislike the surge in the response that comes with S+. It throws off the balance of the car when powering out of a corner and I once almost crashed into a wall, because the surge overpowered the rear wheels and I went sideways more than I planned for. I prefer the linear throttle response of Race mode when driving dynamically and pushing the car to its limits where I need the response of the engine to correspond with the pedal position. I don't care about the shift program in Race, because I use manual mode anyway, which is excellent in the FL with the 9-speed MCT. The enhanced dynamics that come with the Race mode is icing on the cake. The car definitely sticks better in Race than it does in S+ and is more controllable at the limit and during a drift. But a tune will throw off the balance of the car anyway, which is my major point of critic of aftermarket tunes unless they are done comprehensively in combination with upgraded turbos. The stock turbos are too small for the top end where you really want the additional power.

 

From personal experience:

1) There will be NO adverse outcomes from having this done. It does NOT harm the car in and way.
2) Above posters are right. For my 2017 C63, the only difference was engine/throttle mapping. Most noticeable was the throttle mapping and the fact that the car will always stay in the highest gear -- very helpful for tracking / aggressive driving (which should really only be done on the track anyways).

 

After some track days, I realized S+ throttle is too jumpy. Went and unlock Race mode and 9 stage TC on my facelift C63 sedan after reading your helpful reply. Man, linear throttle ☑️, tunable TC ☑️. I used to be a guy who turns of TC first thing after engine starts, TC sport too conservative, TC off too off, made me kinda scared to open out of corner throttle, cause sideway is slow. With RACE mode and TC tunable, I was able to open more throttle out of corner earlier, adjust TC based on grip level, car would pull toawrd exit and rotate nicely instead of trying to drift easily on S+ during mountain runs. Totally worth it if you also track.

The first night driving with 9 stage TC, I told my friends that this car now exits like an AWD car LOL.

 

Do you get launch control when race mode is coded?

 

I just asked the coder, he said it's coded separately.