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2 rear gears in 7G Tronic?

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Old Apr 17, 2018 | 02:16 PM
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C63 AMG 2012 Sedan
2 rear gears in 7G Tronic?
https://en.wikipedia.org/wiki/Mercedes-Benz_7G-Tronic_transmission


1 2 3 4 5 6 7 R-1 R-2
4.377 2.859 1.921 1.368 1.00 0.82 0.728 -3.416 -2.231


What the hell is this? 2 ratios?? Really 2 gears???
Last edited by sander.manzoli; Apr 17, 2018 at 03:42 PM.
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Old Apr 17, 2018 | 03:09 PM
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It comfort mode it uses the the 2nd reverse gear so you don't have too much torque at the wheels.
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Old Apr 17, 2018 | 03:35 PM
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C63 AMG 2012 Sedan
Originally Posted by Jasonoff
It comfort mode it uses the the 2nd reverse gear so you don't have too much torque at the wheels.
Thanks!!
So, when in confort mode, you can go faster in rear than you could do in Sport or Sport+ mode... usefull info for a reverse racing, lol
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Old Apr 17, 2018 | 04:12 PM
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Originally Posted by sander.manzoli
Thanks!!
So, when in confort mode, you can go faster in rear than you could do in Sport or Sport+ mode... usefull info for a reverse racing, lol
fun fact: there's actually an electronic speed limiter for reverse in the ecu, I believe stock is 60 or 80km/h
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Old Apr 17, 2018 | 05:24 PM
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Originally Posted by sander.manzoli
Thanks!!
So, when in confort mode, you can go faster in rear than you could do in Sport or Sport+ mode... usefull info for a reverse racing, lol
No, it would shift from R1 to R2. C just starts in R2.
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Old Apr 17, 2018 | 06:32 PM
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What is the practical purpose of 2 reverse gears? Just so the transmission can cost more?
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Old Apr 17, 2018 | 06:57 PM
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Originally Posted by BalanBro
What is the practical purpose of 2 reverse gears? Just so the transmission can cost more?
Less torque to the ground in slippery conditions, ice and snow especially.
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Old Apr 17, 2018 | 10:12 PM
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I get that, but a car like this would do fine with just one taller gear. It would make more sense to me on a car with a small engine with little torque.
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Old Apr 17, 2018 | 10:25 PM
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You want max acceleration when escaping the popo dawg...
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Old Apr 18, 2018 | 02:19 PM
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Originally Posted by Funkwagen
fun fact: there's actually an electronic speed limiter for reverse in the ecu, I believe stock is 60 or 80km/h
Nice to know...
I´ll try a rear launch in sport (to force R1) and then shift to Comfort, and check if rpm drops (if gear changes to R2)... curious.
Last edited by sander.manzoli; Apr 18, 2018 at 02:24 PM.
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Old Apr 18, 2018 | 02:22 PM
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Originally Posted by sander.manzoli
Nice to know...
I´ll try a rear launch in sport (to force R1) and then shift to Confort, and check if rpm drops (if gear changes to R2)... curious.
And crash into something so you can get a different car and ask these sort of questions on a different forum?

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Old Apr 18, 2018 | 03:31 PM
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Originally Posted by Jasonoff
And crash into something so you can get a different car and ask these sort of questions on a different forum?
I do like to ask these sort of questions... you know, the ones I don´t know the answer... 2 rear gears was news to me. And you seem to love this sort of questions, since you are number #1 replier. Much appreciated!
(And I didn´t see you had already answered my question when you said it would shift from R1 to R2)

And no, I´ll not crash into anything... you can move your weird sick evil desires elsewhere. Not even doing it anymore, since you brought the answer already. Thanks, bad guy! You´re probably nice, specially in good mood!
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Old Apr 18, 2018 | 04:31 PM
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Old Apr 19, 2018 | 02:53 PM
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C63 AMG 2012 Sedan
Originally Posted by Jasonoff
LOL

Good excuse for a high handicap!
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