Oil cooler lines on older diesels (especially 616 and 617)

Along with radiator neck failure, the rupture of one of the large oil cooler lines on your diesel engine can easily ruin your engine. When one of these lines goes you can lose all your engine oil in just a few minutes. If you are driving and not watching your oil pressure gauge you can destroy the engine bearings in short order.

Repairs most often mean an expensive engine overhaul. If you use your Mercedes as a daily driver and plan on keeping it for a long time, replace the oil cooler lines unless you have repair records that they already have been changed in the last 10 years. This is a painful job, but worth it for peace of mind.

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