Unlike the install in my 06S, the install of the new RemoteKey in my 09S PDK has created problems. Specifically codes thrown on spoiler and a few other issues. When my PSE was installed they disconnected the wiring.
I want to reinstall with a fused line to the fuse box, no problem.
Where can I find a good ground point, preferably without tapping into an existing ground wire, as before?
I love the module and it generally worked fine.

 

On my last 3 cars, I've added a switched outlet right above the clutch pedal, to power things like radar detector, XM radio, etc. I've successfully grounded at the anchor stud for the fuse panel, at the lower left corner of the panel (with carpet removed). I remove the 13mm nut, put a flat washer on, then my ground wire, then the nut again. This location is nice and handy.

 

Super!! Thanks!

 

I am trying to jump start my 911. Where is a good ground on the car ?
I notice the manual danced around the issue.

 

Manual says you can use negative terminal of the battery if no suitable other ground is available.

Always observe the sequence below:
1. Connect the positive lead (red) to the
positive terminal of the discharged battery
first, then connect it to the positive terminal of
the donor battery.
2. First connect the negative cable (black) to
the negative terminal of the donor battery, then
connect it to a suitable grounding point on the
vehicle with the discharged battery.
This grounding point must lie as far as possible
from the battery.
For example, a solid metal part or the engine
block are suitable grounding points.
If no suitable grounding points are to be found
on either vehicle, the negative cable must
carefully be connected directly to the negative
terminal of the battery.
If a suitable grounding point is to be found only
on the donor vehicle, the negative cable must
first be connected to the terminal of the
discharged battery, then to the grounding point
of the donor vehicle.
3. Run the engine of the donor car at a higher
speed.
4. Start the engine.
An attempted start using jumper cables should
not last more than 15 seconds. Then allow a
waiting period of at least one minute.
f Note
Before disconnecting the jumper cables, electrical
loads such as the heated rear window
and the heating fan blower should be switched
on (the vehicle’s lights must not be switched
on). This reduces voltage peaks which may occur
when disconnecting the jumper cables.
With the engine running, remove both jumper
cables in reverse order