You guys forgot to mention the 123's real achilles heel, water leaks!

Lift the carpets and look for water in the floor, especially in the rear seat area. Pull the trunk side liners and look for water in those wells. And pull the battery to look for corrosion on the firewall.

Mechanical stuff is all relatively easy and cheap on a 240D (if it's a 4 speed manual). Body and interior stuff can get expensive.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References