VFORCE09

Hi all

I have and issue with my 2016 C450

For first time in two years of having the car i was able to go to the track and test the vehicle and to my surprise the top speed limiter kick in at 130 mph at 4000 rpms
now this is a concern to me when Mercedes advertised the top speed was limited to be 155 MPH, has any body with a C450 has had this issue
please let me know
Regards

MASSC450

The speed limiter is set at the factory dependent on what tires are installed at the time. If your car came equipped with 18" AMG wheels & A/S H rated tires, the speed limiter was set to 130 mph. If your car came with the 19" AMG wheels and performance Summer tires, it's set to 155 mph.

The only was to change the speed limiter is with an ECU reflash.

VFORCE09

I have 19" AMG wheels with run flats from the factory

MASSC450

Then either a mistake was made at the factory when assembling your car, or the dealership you bought the car at switched the wheels from the 18" to the 19" wheels you bought the car with.

Go back to the dealership you bought the car at, and have them generate a build sheet from your VIN.

VFORCE09

Thanks for the information
yes i will have the dealer check on this because I ordered the car with 19" and it should of not came with 18" per the window sticker,

Star4life

ive seen a lot of these threads now. I am starting to think all US Spec c43 are limited at 130 MPH regardless of wheel setup.


I have the 18" all season tires and my car is definitely limited at 130 MPH. Verified multiple times.

This guy has the 19" and he has verified 130 MPH. (Dealers dont just change wheels).




SO i think the real question is has anyone in US ever seen 155 MPH in thier c43 or c450 stock? No tunes of course.

17merc43

I was facing this same issue during freeway fun. 130mph was the cap for me, so I just bit the bullet and got an ECU tune. Now I have no limits at all haha

Star4life

yea tune is what ill be getting as well. it gets to 130 with no problem. i am sure the tune makes 140 cake and 150+ is not a problem

Star4life

https://www.mbusa.com/mercedes/futur...QUE-GALLERY-ID 0 0



on mbusa it states the coupe is limited to 155. so maybe coupes are 155 and sedans are not. which is pretty crappy.

VFORCE09

on my 2016 sedan its said that the top speed was 155 MPH (Est.) on topspeed.com and Mercedes 2015/2016 year

I already discussed this with my dealer and there checking on this since i have 19' and not 18" from factory

17merc43

It is so worth it. The stage 1 I got from AMR is unreal lol its a whole new car! Highly recommend

Dino944

+1

My understanding was that all US spec C43s were limited to 130 mph (regardless of which wheels/tires were put on the car when ordered). Car and Driver tested a car equipped with 19" wheels and summer performance tires and the car only did 134 mph. https://www.caranddriver.com/reviews...an-test-review

agchenry

I know this is an old thread but anyone tried going over 130 in dynamometer mode to see if it will go over?

Star4life

i think youll have to find out for yourself.

realistically, if you need to go faster than 130, you are probbaly pulling with someone and you are gunna want the tune. lol so may as well just get the tune.

agchenry

if I’m going to do a pull in Mexico at most it may happen 3 or 4 times a year not really worth a tune for that many pulls lol. Next time I go to Mexico I’ll update y’all lol

tivoboy

Didn't run into this at laguna seca.. could only get 132 at the end of the straight!

C43Ayemgee

130 comes really fast in this car, not fun when you're racing in mexico and race ends short..

agchenry

Hence the reason for finding out if the limiter is still there while in dynamometer mode

C43Ayemgee

I don't even know what that is, but better off just getting a tune, get more power anyways.

agchenry

dynamometer mode is when u put the car in Dyno mode so it removes all nannys(abs,tc, etc.) so it can be tested on a Dyno. As for power yes slightly more power than my jb1.

C43Ayemgee

Wow, what other mods do you have? just jb1? that time is great.

agchenry

That’s all

Star4life

dyno mode does not remove limiter tested in mexico last weekend.

must be coded out with SDS or full ecu tune

agchenry

Thanx for the update, I hear Mexico is nice this time of year lol i

munis

Tested mine in Mexico today as well. Bounced off 215kmph twice, haha.