On my 155 I found that a whole lot of stuff have up at 130,000 and then another load of stuff gave up at 180,000.
The motor is indestructible if you give it regular oil changes (one head gasket being a failure at 130k and the other one at 180k) ...
Tarquini doesn't have any suspension issues.. just one set of front wishbones and two wheel bearings in 220,000 miles. The rear dampers are still hanging in there, though the rear subframe and bushes have seen better days..
Discs and exhausts and clutches wear out eventually but the originale BOGE front dampers made it to 181,000 when the strut top mount bearings could've gone a bit more.
Water pump does 200k (12v v6) no bother though is pretty "racy" by then..
Thermostats, batteries and Lamdas seem to cling on for 5 years, regardless of mileage.
Fuel pump is originale but the rubber hose lifting fuel to the outlet pipe split... (fun getting to the bottom of that one..!
Fuel hoses in the engine bay perished/cracked/leaked after 10-11 years old.
Webasto sun-roof relay died at 125k.
Window motors both a bit shonky at 160k
The key wore out the door lock at 190k. Come to think of it.. the key looks a bit like a lolly stick too..
Body is "not bad".. but some creeping rust under the rubber Schutz on the underneath. Windscreen was killed in action and the replacement has been mortally wounded. Wiper relay got water ingress on it and died. Brake pipes are all corroded after 14-5 years or 200k.
The greatest threat to the beast's survival is not so much stuff wearing out but rather you not being able to find replacement pieces. I've lost track of how many genuine parts I've bought for the 155 that were "the last one" in AR's system...
My 145 is more or less following this same pattern.. though he's just a junior at a mere 120,000 miles..