Knocking and blue smoke

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Cityfinal

New Member
Joined
Jun 2, 2013
Messages
2
Car
Mercedes CLS 320 Cdi
Bought an 07 S320 cdi 148k with the description of blows blue smoke and knocking from the engine. Doesn’t sound like crankshaft knocking, but knocking increases when revving the engine. Highly likely to be an engine swap, but just to make sure, does anyone have any other ideas before it comes out.
Last oil service 200 mile ago. Has service history going back 80k.
 
I'd suspect a diesel injector problem. Surely someone here will advise better than I can.
 

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