With 100k miles soon to appear on the clock what are the suggestions for a special birthday treat?

I am thinking;

injectors (showing signs of leakage).
drive shaft flex plates.
gearbox flex mount.
sway bar bushings.

The general thinking is that these are items that are probably functioning OK but are just now old and reasonably easily replaced.

Otherwise the car drives like a new one.

Anything else?

One other thing. On the weekend went for a drive and the RH rear window worked fine. Parked the car in the sun beating on the RH side and an hour or so later went to drive home and the RH rear window was dead. I remember noticing the RH body work was too hot to touch around the trunk area. 15 or 20 minutes later when we were out of the sun it worked fine. The heat is all I can think made the difference as it has never ever played up before and works fine now.

89 300CE
156k kms