W212 E63 Model-S top speed???
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C63 W204 / E63S W212 / E63S W212
W212 E63 Model-S top speed???
Hello everyone,
Before getting to the point id like to give a bit of background. I have a 2016 E63S CPO stock “i think”, I bought it a while back with 15k miles on it and per dealer the ECU/TCU/Nav were updated during that CPO certification process.
A bit more to the point now, recently i was down in Mexico and while doing a pull i was approaching the 186 mph electronic limiter or so i thought. When the car did reach 186 mph on the speedo i thought thats where it stops but it kept going and at 190 mph it was still accelerating though i had to let off due to room. So now I'm confused, only mods I've done to the car are K&N filters + Res delete.
Anyone else have been in a similar situation? Or the car is simply tuned? A glitch maybe? No signs of tampering on the ECU and when i bought the car, hand held tunes weren't available yet if I'm not mistaking “Early 2018”. Opinions are appreciated,
Thanks
Before getting to the point id like to give a bit of background. I have a 2016 E63S CPO stock “i think”, I bought it a while back with 15k miles on it and per dealer the ECU/TCU/Nav were updated during that CPO certification process.
A bit more to the point now, recently i was down in Mexico and while doing a pull i was approaching the 186 mph electronic limiter or so i thought. When the car did reach 186 mph on the speedo i thought thats where it stops but it kept going and at 190 mph it was still accelerating though i had to let off due to room. So now I'm confused, only mods I've done to the car are K&N filters + Res delete.
Anyone else have been in a similar situation? Or the car is simply tuned? A glitch maybe? No signs of tampering on the ECU and when i bought the car, hand held tunes weren't available yet if I'm not mistaking “Early 2018”. Opinions are appreciated,
Thanks
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2011 E63, 2011 Hyundai Genesis 4.6 v8, 2013 GMC Denali XL, 1965 Ford Mustang, 2005 Merc. E500
Be very careful the tires on your car may be rated to only 186 mph. Above 186 mph the tires can suddenly explode.
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C63 W204 / E63S W212 / E63S W212
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C63 W204 / E63S W212 / E63S W212
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From: SomewherebetweenDCandFL
On the shoulder
The speedo on cars is usually off by a certain percentage. I am not sure what percent MB ones are off, but it can be as much as 5%. So, while your speedo indicated 186+ mph, you probably were going slower than the limiter-induced 189 top speed. If you can have a GPS device running, you could verify your actual speed.
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CLS 63 and M4
he either has a tune that wiped the governor or the speedo is optimistic.
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C63 W204 / E63S W212 / E63S W212
Thread Starter
Senior Member
Joined: Oct 2015
Posts: 274
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From: Earth
C63 W204 / E63S W212 / E63S W212
The speedo on cars is usually off by a certain percentage. I am not sure what percent MB ones are off, but it can be as much as 5%. So, while your speedo indicated 186+ mph, you probably were going slower than the limiter-induced 189 top speed. If you can have a GPS device running, you could verify your actual speed.
But even if the speedometer is off, doesnt the ecu cut power according to speed sensors?
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From: Boston area
2016 E63 Wagon
That's one of those urban myths. A tire rated for 186 or whatever number does not simply explode at the limit +1 mph. They are designed to carry the full load of the car, for an extended period of time, on normal temperature blacktop, hitting road imperfections, at that speed. With a safety margin.
The thing that makes the tire break is temperature. Hence, if the outside temp is low, or roadway is cool (think early morning) - or even wet(!), the car is empty, etc., the tire can go pretty far above the rating with no danger.
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2016 E63 Wagon
To OP - we had a similar discussion a while back. Seems like a fairly random definition of limiter at 175 or 186 for 2016 cars, no tied to sedan/wagon either.
Prior MBWorld discussion around this
Prior MBWorld discussion around this
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C63 W204 / E63S W212 / E63S W212
Thread Starter
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From: Earth
C63 W204 / E63S W212 / E63S W212
To OP - we had a similar discussion a while back. Seems like a fairly random definition of limiter at 175 or 186 for 2016 cars, no tied to sedan/wagon either.
Prior MBWorld discussion around this
Prior MBWorld discussion around this
Last edited by timm206; Jul 24, 2020 at 05:15 PM.
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From: DC
2014 E63S AMG
That said, the faster you're going the less accurate your speedometer is. It may have shown 190, but I doubt he'd even have hit 180 verified by GPS with that showing.
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CLS 63 and M4
He's fine. Speed ratings are done via 10 minute interval tests. That means that Z rated tires are rated for a sustained 186 mph for 10 minutes. They can relatively safely exceed that in short spirts as long as we're not talking any type of extreme speeds (I wouldn't go 240 mph on Z rated tires).
That said, the faster you're going the less accurate your speedometer is. It may have shown 190, but I doubt he'd even have hit 180 verified by GPS with that showing.
That said, the faster you're going the less accurate your speedometer is. It may have shown 190, but I doubt he'd even have hit 180 verified by GPS with that showing.
*and yes...I realized my first post said it’s possible that the speedometer is optimistic. But then I thought about it, more.
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C63 W204 / E63S W212 / E63S W212
here’s the thing, tho...accurate or not, isn’t the speedo what the ECU is going by to determine the speed at which to cut-in? And if his speedo was actually saying 190, then there has to have been something done to the limiter, no?
*and yes...I realized my first post said it’s possible that the speedometer is optimistic. But then I thought about it, more.
*and yes...I realized my first post said it’s possible that the speedometer is optimistic. But then I thought about it, more.
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From: Boston area
2016 E63 Wagon
The car knows it's true speed (as long as you have not changed wheels and tires, or at least have kept constant circumference).
The offset is set form the factory, and is set to a a couple of km/h above the true speed.
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From: DC
2014 E63S AMG
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C63 W204 / E63S W212 / E63S W212
But the value displayed on the speedometer is just a value determined to be displayed by the ECU (it may technically not be the ECU but one of the other boxes).
The car knows it's true speed (as long as you have not changed wheels and tires, or at least have kept constant circumference).
The offset is set form the factory, and is set to a a couple of km/h above the true speed.
The car knows it's true speed (as long as you have not changed wheels and tires, or at least have kept constant circumference).
The offset is set form the factory, and is set to a a couple of km/h above the true speed.
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From: monterey ca
14 e63 s Amg8 ml63 07 screaming eagle fj 40 71 dt250 360 quads
I find it interesting that the car was still pulling hard at 190 I’ve had my car to 181 I andfrom 170 to 180 it was not pulling hard still pulling still gaining but surely not pulling hard and the 181is an official time By Southern California timing and scoring, same people that does Bonneville ,I was not looking at my speedometer so I cannot verify what the car said it took me A mile and a half to achieve 181 from a dead stop. Factoid!
