[Sunroof]

Does not matter if its an "S", "E" or a "T", as an owner of a 1973.5T I can tell you that one critical spot that is well known for rust is the "bowl" under the rear seat accessible under the car above the half shafts. What happens here is with rear pop-our windows, seals can weaken and water will weep past the seal run down inside over the wheel well and under the rear seat and cushioning. This is where rust will begin and perforate where moisture will make its way into the "bowl" under the seat. Unseen and allowed to remain the metal is eventually impacted. Wiring bundles are held at these locations with rubber retainers that attach into the bowl. Here is where the greatest deterioration occurs.

A good mechanic performing a PPI on an older 911 will use a small pick and without tearing the car apart locate rusted areas.

Good luck

Bob