Sort of well maintained car, valves, filters etc. I do take care of the old beast but performance has been really bad lately. Runs ok on level roads with good acceleration etc, but heading uphill, pedal to the floor it is struggling. I don't remember it running this lousy. I know it's no rocket ship and the tranny seems to kick down as required but it really feels sickly.
What's the big items to check? My Volvo turbo would collapse a hose once in a while, intake side and that killed my turbo. I think the W123 has some super critical things controlling the engine and turbo that need to be looked at, but I can't remember what. I've owned W123's for the past 15 years but lately my 85 has only been getting weekly runs and grocery store runs during the day. I do drive it once every couple of months for 300 miles at highway speeds.
Thanks

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1985 300D 197K - Semi-Daily Driver Diesel
1998 Volvo V70 AWD 226K - Daily Driver 2
1998 Volvo S70 140K - Wife's DD
2003 GMC Sonoma ZR2 Option - Rusty Truck
THE BABY 1958 220S Sedan 66K All original, never restored and never will be.