bscardin

I was having issues with my 2010 S4 and ultimately they had to replace the Mechatronics module and update the software. My question is: is it possible that this would enable launch control on my car? I remember hearing that the 2010 owners were pretty much SOL when it came to LC but I was just curious since this was a pretty major hardware swap.

I am tempted to just try it but not knowing how it is supposed "feel" when I apply the gas with the brake on I don't want to push it and mess up my newly fixed transmission

phil47

You'll know very quickly as there should be no strain against the brakes if LC is active.

zulujams

What were the issues you were having with your original tranny and how many miles did you have on it? Curious 2010 owners want to know, thanks!

bscardin

@phil47 - That's what I was afraid of. Looks like no LC for me; there is definitely straining against the brakes when I set "ASR Off" and go to sport/manual mode (I don't have drive select or sport diff). Bummer.

@zulujams - The problems started around 33,000 miles. The main symptom was an unsettling "clunk" into first gear when starting from a stop. It seemed to be worse when on a slight uphill (and often start rolling back right away when I took my foot off the gas). It started very mild but it got progressively worse over the next couple thousand miles. I also noticed that the RPM needle was surging/bouncing quite a bit when I was cruising at constant speed (very bad at ~40 mph). By the time I was taking it in for the service it was very bad and made me cringe every time I took off! Now that it's fixed I find myself bracing for impact (that is no longer there) each time I take off

FWIW - This car was a "demo" car that had ~250 miles when I got it. It is a lease so I wasn't too concerned but I imagine it was flogged pretty good in those first miles. Might not be related but still...