Yes, we have a 'crippled' version
Set the car in S6, DSC off, P500 sport and stop the car. Push the gearlever forward and hold it there. Slowly depress the acellerator.
If you move forward, your dealer has not activated the LC program.
If the engine revs to about 1600 rpm and stays there, you have Launch Control.
Keep the accelerator floored, and release the gearlever. The car drops the clutch, and depending on how much traction you have, you will get varying amounts of wheelspin and the car will take off. You will need to shift manually, there is no automatic shifting.
Re: Yes, we have a 'crippled' version
What the hell is the point of that?
How dissapointing, I was really looking forward to the 4,000 rpm, automatic shifting version I read about in the European magazines.
On every other BMW model with LC,
if you slightly depress the gas pedal, it will not initiate launch control. You must fully depress the accelerator to the floor quickly past the kickdown point. I have tried this on both Z4 w SMG and 530 w SMG and 330i(E46) w SMG, and E60 M5 w SMG
but BMW isnt looking forward to replacing clutches
Well, then that's me and 60 other US M5 owners.
I'm not sure where you're getting your information. Do you actually own a US spec E60 M5? If you want to know more, go to this link:
You'll find over 60 US M5 owners discussing the crippled LC. We are very familiar with how it works, and what it does and doesn't do.
The way it looks, it needs "Laugh Control"
It's not the launch rpm that's the problem.
The problem is there is no modulation of the clutch. With the Euro-spec M5, the LC modulates the clutch to achieve optimum engine rpm and wheel traction. A sensor then monitors the clutch plate temperature, and does not permit another LC launch until the clutch has cooled off.
With the US spec cars, there is no way to control or modulate the clutch. You are reduced to choosing the rpm and throttle position and then you dump the clutch. This garantees a pretty miserable launch 95% of the time. But since there is no clutch slippage, we can launch poorly as often as we want.
is USA M5 launch different from M3?
I'm very happy with my M3 launch, gets off with some wheelspin but quite quick, never breaking loose.
If it is different, I'll be pissed.
Thanx for the info.
'02 ///M3 TiS/grey SMG Cpe
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Here's how, read>>>>>>>>>>>>
The 7-speed SMG of the U.S. version M5 incorporates a number of special functions and safeguards, one of
which is Launch Control. To activate this feature:
The Dynamic Stability Control (DSC) must be deactivated via its console button.
The SMG Drivelogic must be set to the S6 (Sequential 6) program.
The front wheels should be aimed in a straight ahead position.
The shifter lever needs to be held in the downshift position and the accelerator pedal fully depressed.
This will raise the engine up to 1600 rpm.
Ready to go, the driver simply releases the shift lever; the M5 launches with precisely balanced clutch
slip and wheel spin for an optimum start.
Wolverine is right - see BMW bulletin
Also it does make a difference in the LC sequence how fast you press the pedal to the floor (past kickdown). Flooring it produces massive wheelspin, slowly depressing it - perfect launch. (the same as M3)
I think you mean DSC and S6 on M3. Piece of cake.
From dealer training materials
Launch Control. In the S6 program, the driver can utilize a further SMG capability. Dynamic Stability Control must be de-activated via its console button. Then the driver holds the shift lever forward (as if for a downshift) and presses the accelerator pedal fully down. This raises the engine to 4000 rpm, ideal for launch. Ready to go, the driver simply releases the shift lever; the M5 launches with precisely balanced clutch slip and wheelspin for an optimum start. From there, SMG will upshift automatically just beforethe engine redline. Thus launch control gives essentially the same standing-start acceleration results as would an expert driver. To preclude overheating the clutch, the control system requires an interval of several minutes between Launch Control starts; and if the clutch monitoring logic does ever detect clutch overheating, the clutch engages fully rather than slipping.