Removing the engine mounted air filter housing on the 1978 to 1985 OM617 turbo diesel will allow you to inspect a number of very important areas on this engine. One, in particular, I consider critical to the long term health of your diesel. Click SHOW MORE for product links:

Turbo intake elbow seals: https://mercedessource.com/store/617-turbo-diesel-intake-elbow-rubber-seal-replacement-kit
Video modifying turbo air inlet plastic elbow: https://mercedessource.com/store/making-certain-the-turbo-inlet-elbow-seals-stay-place-demand-video
Turbo inlet oil gasket: https://mercedessource.com/store/turbo-diesel-oiler-inlet-pipe-gasket-new
turbo drain leak kit: https://mercedessource.com/store/617-turbo-diesel-turbocharger-oil-drain-leak-fix-kit
Short hose kit: https://mercedessource.com/store/240d-300d-300sd-diesel-engine-short-hose-kit
Clean aluminum coolant housings - repair kit and video: https://mercedessource.com/store/aluminum-coolant-housing-hose-nipple-restoration-kit
H.D. Air filter housing bracket: https://mercedessource.com/store/617-turbo-diesel-air-cleaner-reinforced-bracket-installation-kit
Air filter housing rubber mount kit: https://mercedessource.com/store/turbo-diesel-air-filter-housing-rubber-mount-repair-kit
Heat shields for rubber mounts: https://mercedessource.com/store/617-turbo-diesel-air-cleaner-rubber-mount-heat-shields-set-3

Diesel Motor Mount Kits and tools: https://mercedessource.com/store/search?keys=MOTOR%20MOUNTS