Z28Camaro

I've had my 08 E63 for about 2 months now and have noticed that it has a tendancy to shift into the next gear when any loss of traction is detected. The car does this whether traction control is turned on or not. From what I read on the board its relatively normal.

A great example is when I'm in sport mode in 2nd gear and punch the throttle. The car will be at about 5K RPM and will go to 6K RPM and then short shift into third. Anyone who has experienced this will know that the car is dramatically slower than if the car would go to red line and then shift into 3rd.

Now I'm accustomed to the short shifting into 2nd until the car is more "trained", but the behaviour mentioned above is even more of a problem and seems to not change even if the car is driven hard prior to occurrence. (By the way, I've never been able to get the car to go to red line in first gear then shift to 2nd, even with "training")
Is there any way to get the car to not do this or do I need to drive the car around in dyno mode to get it to quit interfering with the throttle when it detects wheel spin?

Also, I have new Michelin Pilot Super Sport tires on the car, so without going to drag radials I'm not sure how to get more traction, the car is also a P30 so it has the AMG limited slip diff.

DAGREEKNYC

is it happening only with tirespin ? or even with WOT runs with no traction kicking in ? i had a similar problem with my car not being able to maximize RPMS on shifts .

try resetting all adaptations and just try manual shifting for a while in Sport mode to see what happens . WOT in Sport 1 and let is shift on its own .

Jon2007E63P30

Software stopping you from hitting red line.

I used to be able to select 1st or 2nd, and at 4k RPM nail the throttle and hit the rev limiter on a reliable basis.

With an 07 I had earlier revisions of the tranny software.

I now have a different program in my tranny which is likely a CLK63BS revision or similar. Not sure, they only spoke German. In any event, it does not do it anymore.

Z28Camaro

Yes, the problem happens only with tire spin as far as I can tell. I drive the car in sport mode and manual shift frequenly so I'm not sure this will do much.

I'm not sure how to reset adaptations since the ECU reset isn't supposed to work with the E63. Got any more suggestions?


If this issue is software related then I'm not sure how to improve it beyond meeting your German acquaintances.

DAGREEKNYC

[QUOTE=Z28Camaro;4793500]Yes, the problem happens only with tire spin as far as I can tell. I drive the car in sport mode and manual shift frequenly so I'm not sure this will do much.

I'm not sure how to reset adaptations since the ECU reset isn't supposed to work with the E63. Got any more suggestions?



The sneaky reset does not work but resetting thru Star does .

NCE500

I think you need an updated TCU flash.

When I bought mine 2 years ago, shifting was a bit lazy and inconsistent. My dealer updated the TCU with the at the time (July 2009) latest "M1" flash. In S mode it now shifts 1 - 2 early (5500 - 6000) ONLY if it detects wheelspin, otherwise it will shift every gear perfectly and consistently. 1-2 at 6500, 2-3, 3-4 etc. etc. at 6900 RPM.

Never bounces off the limiter unless I am in manual mode; IMO manual mode in 1st and 2nd gear at WOT is not beneficial, it revs so quickly that it hits the limiter most every time before one can shift it. I run mine in S mode all the time and have consistent pretty much optimal performance.

Jon2007E63P30

Agreed, make sure your software is up to date.

The adaptation is very quick. In S, one lap of the track gets it all re-adapted.

Sorry, the Germans went back home.

Z28Camaro

Thanks for the advice guys. Next time the car's at the dealer I'll check to see if it has the latest transmission software.

MB_Forever

In sport mode, my car will shift at red line in every single shift except from 1st to 2nd in which it likes to shift around 6200 to 6400 rpm. However, I am usually able to get it to shift at 6700 to 6800 rpm after a few hard launches and some "training".

In manual mode, you can shift at red line every time but the 1st to 2nd shift is still tricky to time because the engine revs faster than the tachometer.

Jon2007E63P30

Yes it does!! And, yes it is hard to time. If you miss, though, the big rev limiting brick wall will let you know.

Z28Camaro

My car will do the same thing. The issue is when your in sport mode and holding he car in 2nd at around 40-50 MPH. Try punching the throttle to the floor and hold it until it shifts to third and see what happens.