I've never had a problem with the two 123's I came across except for one thing. When I first bought my coupe, while driving it down from up North, the temp. was fine until I hit Northern Florida. Then it started to climb to about 100c & remained there till I got it home. What I found was the radiator was plugged in between the fins with fine grit like sand. A garden hose & compressed air fixed it. These cars are 20-30 years old. Plenty of time for stuff too small to notice to restrict airflow. my 2c Enjoy Paul.

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1984 300CD red/blk 290,000 partial resto
1980 240D 4 sp Brn/palomino gone
1997 Mazda Miata STO edition wife's baby
1988 Lincoln Mark VII LSC next resto
1986 Subaru GL wagon daily
1993 Isuzu pickup field beater
2008 Honda Civic EX-L 5sp wife's new car
1978 Honda XL350
1974 Honda XL70 my Calif. ride in HS