My first car in 1973 was a 300SE (1963) that had air suspension. The main air valve block leaked (badly) and a new one was over $260 at the time. "Repaired" the rubber diaphragm several times with then new "super glue". Usually held for the weekend's activities.

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Hanno
'79 6.9 Sold (after 27 years)
'83 280SL, 5 spd.
'94 E320 Sdn. 5 spd conversion
'02 E320 Sdn.(on loan to mom!)
'87 300E (5 spd. conversion) Sold
'05 E500 Wagon