996tt tiptronic problem

[AngelOfGrief]

Hello!

I own a MY2002 996TT w/ a tiptronic transmission (produced by Mercedes as I hear).

I bought the car recently and only driven it around 3K miles this season. Mileage is about 45K. The car was running fine

w/o problems whatsoever. Recently, after a long aggressive drive (around 5-6 hrs on a weekend) I was parking

the car, I put it in P and left for a few seconds w/ engine running and when I returned to the car, I put in D and it would not

engage. The car did not move as though it was in neutral. The dash read "2nd gear" and the engine revved up

a bit like usual to compensate for the gear. I moved the gear selector around a bit and after I put it into R it worked

fine and I was able to park the car as usual.

The problem never emerged for around a week or two (I drive everyday, always aggressively). Yesterday, exactly the

same circumstances: a long aggressive drive (6 hrs on a holiday), no problems whatsoever: I did park the car,

went to shops, cafes, shut engine down several times -- all was running fine. Then, at the end of the day at the parking lot,

when maneuvering around very slowly, I put in R and it would not engage. I had to move the selector around a few times

to get it to work. This time, however, I noticed after this fail the gears would engage with a considerate car jerk: both D and R.

I parked the car and left and haven't used it since.

One important thing to note is: it's a multi-storey underground parking and I have to drive very slowly for around 5-7 minutes

with car inclined. Both times problems happened after this drive, never on a driveway or city. Could this somehow cause misfunction?

Anyone experienced anything similar? I am first going to take the car for trans fluid level check, maybe have fluid and

filter replaced, would that help? There are no leaks whatsoever...

Thank You.

p.s. I am really upset about this. :( Funny thing is a have an Audi A5 3.2 and it had tiptronics problems too (leaks, no shifting

problems however) - costly repairs.

[Loren]

Start by having the fluid level checked.

And have the car checked for transmission fault codes (you will need a shop with Durametric, a Porsche PST2, or Porsche PIWIS tester.

[AngelOfGrief]

Thanks, that's what I'm going to do. I consulted a local tech and he said they are having PIWIS delivered from day to day, he also said Porsche diagnostitcs provides extensive fault codes for transmission, so something is sure to come up.