Hi.
I figuered something out a few days ago. When you switch into speedshift (by holding the shift knob the the left for a few seconds) you supposedly downshift. I don't know whether you actually downshift or if the computer raises the rpm slightly, but it doesn't really help you launch your car good from a roll. The trick is to downshift again manually. After initially going into speedshift mode by hold the shift knob, pull it to the left one more time and this time it will really downshift. The launch is going to be insane, I guarantee that you will fall in love with your car again

Just thought I'd pass this along.

 

Not trying to be a smart ***, but can't you just manually down shift twice in the first place and not even bother holding it over?
I never "hold" it over. I just click to the left for each gear I want to downshift. I've never had a problem that way and accomplish the same thing from what I understand by your post and it's a little quicker.

 

switch into speedshift? eh? you just toggle the gear you want by shifting left or right while in D. nothing special about holding it to the left.

 

holding it to left is supposed to put the car into "speedshift" which puts you in the best gear for best performance, he is saying that if u do this then downshift again you get better results. The speedshift program is not to just downshift, but it is supposed to be more for track purposes because it downshifts and up shifts for you while braking or cornering and accelerating instead of just downshifting, all that does is shifts down a gear 2 or whatever, while if you hold it to the left it puts it into "speedshift", ya dig?
Thanks for the post

 

I don't get it. I tried it tonight out of curiosity at various speeds and it didnt do squat by holding it to the left. Obviously if I just tapped it then it would downshift. Why the heck would mine not work?

 

Does it say anywhere what geaqr you are in. I was driving my car today and it doesn;t even say what gear I'm in which is odd. I mean I know what gear I'm in but after like tlaking to friends, phone, not paying attention you can forget the different between 3rd and 4th.

 

holding the lever left for a second the gearbox will automatically select the lowest gear possible. however in some cases it would not go into the lowest gear because if it does it you would be in the 5k rpm range already, so the computer will select the next gear instead. for example if you are going at 55mph and you hold the lever assuming it would hit 2nd, but instead it would select 3rd and put you in the ****tiest situation ever because at low rev 3rd gear at that speed just doesn't pull. BUT if you manually tap the lever again and select 2nd you would have soo little rpm range/gear to climb you are instantly shifting into 3rd. my advise: don't race ppl start from a 55 mph roll.

anyway, Speedshift is not something you select. doesn't matter if you are in drive or manual mode Speedshift is always there. It is the default transmission shifting software in all AMG.

 

Don't own a C32 AMG here, but FrankW is absolutely right, there is no speedshift mode that some people on this forum are so intent about. You do not access speedshift mode by holding the gearshift lever to the left for one second.

Speedshift is a feature on transmissions of AMG cars that reduces shifting time, it also has a special programming that allows for more aggressive downshifting while braking and greatly reduces the gear shifting while cornering to prevent upsetting the weight balance of the car in mid-corner.

Speedshift is probably most akin to Porsche's Tiptronic transmission, a very intelligent and performance oriented automatic transmission that usually tries to avoid upshifting in mid-corners.

 

That's what I though. Thanks for the clarification Frank & Pat. Bobby seemed quite sure of himself...."ya dig"?

 

Im pretty sure what i was saying was the same thing as frank and pat, i was just agreeing with the first post and saying thanks for sharing, even though it was obvious what he posted, its still good for him to share that as some people might not know. Now let me clarify everyone with what the "speedshift" is:
The high-tech V6 transfers power to the rear wheels via a five-speed automatic transmission with a newly developed one-touch function to suit the extremely sporty character of the new AMG models. Mercedes-AMG’s SpeedShift configuration combines the advantages of a five-speed automatic transmission with the immediacy and control of a manual transmission for the first time.

Innovations include:

Active braking downshift: If a high pre-set rate of deceleration is achieved, the transmission automatically executes a downshift – useful before taking a bend briskly, for example. At a high pre-set rate of lateral acceleration, the transmission maintains the same gear through the entire bend, preventing load-change reactions. In addition, selection of the correct gear allows the car to be quickly and powerfully accelerated on exiting the bend. Both hands may stay on the wheel, for a further increase in driving enjoyment and safety. The almost instantaneous calculation of longitudinal and lateral acceleration forces necessary for the active braking downshift function is carried out by wheel speed sensors acting in conjunction with the transmission management system.

Optimum gear function: This technology makes overtaking easier by automatically selecting the gear that ensures the best acceleration according to the speed and pre-stored characteristic engine data when the shift lever is moved to the left and briefly held in that position.

Torque converter lockup: A lighter torque converter with a lower inertia reduces torque converter slip above first gear by means of a mechanical lockup clutch. This means that the V6 engine responds immediately and directly to the accelerator in any driving situation.

Sporty shift program: The engineers at Mercedes-AMG have also configured the Speedshift program in line with the engine’s dynamic character. The shift points and shift logic are tailored to the high-performance engine. The result is 35 percent more rapid gearshift response compared with the basis transmission.

Naturally, the transmission also shifts down to the correct gear in other situations, intelligently taking account of the driver’s requirements by analyzing the pedal and driving dynamics. It also rapidly recognises gradients and will use the braking effect of the engine on downhill stretches, for example. This transmission may either be controlled by one-touch shifting (+/-), or manually, and is specifically configured for the uncompromisingly sporty character of the new AMG high-performance cars. The selected gear is displayed in the AMG instrument cluster.


"Ya Dig"?

 

i thought this is what you said

 

yep I did, thats why I clarified it for you guys with my last post

 

I think the AMG's sleep shift sucks. I have to set my shifts in earlier due to the lag in response. Down shifting manually rapidly while coming to a stop is just scary. It seems like all the other German manufacturers are better setup than Mercedes is. CAN ANYONE TUNE THE TCU??? Reducing the time in between shifts would be great. Or is it possible to use the TCU from the C63?

 

Yeah, I agree. After reading the write-up from Mercedes, you'd think this was some awesome transmission, but it's really not. It seems like the hardware involved is pretty good (5 gears with pretty good ratios and able to withstand a lot of power) but the software sucks! I honestly have no more control over this transmission than I did over any GM auto transmission I've owned. Often times, the downshifts are slow and lazy. Many times, it does not downshift to a low enough gear. Also, under harder acceleration, it will basically ignore any driver input on a "manual" up-shift.


Jerry! Are you listening? Time to crack the TCU!!!

The one thing I DO like is that it will hold the gear you are in if you quickly jump off the throttle during hard acceleration. This allows you to get right back on it without the car having to downshift again.

 

...accept when it gets stuck there and won't let you upshift when you're trying too.

 

i agree too..its really slow,like its half asleep man...can it be improved??

 

What AMG needs is a kick *** 6sp manual gear box. but benz's mean traget is luxury and older crowd.

 

As simple as that, the user manual descibe the Speedshift function in "Driving" section.

- shift to -/+D to change the lower/higher gear
- hold the -/+D to shift the possible lowest/D gear, engine rev "may" occur (this subject to the gear position)

I think speed**** is just reduce the shifing movement like when I drive uphill last Sat. in D, I hold -D and it shown 3rd after few sec., it just by pass the 4th.

 

I agree with that one, that happens to me when I'm not using manual mode and just floored it. I don't want it to keep it in gear at 5k+ RPM and I have to hit the shifter a couple of times to get it to shift up.

 

Mine doesn't upshift.