CLS 320 CDi Knocking/Pinking under acceleration

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Veg

New Member
Joined
Nov 2, 2014
Messages
19
Car
W219
Under hard acceleration it knocks/pinks but fine if you do it gently. Has been hooked to a STAR -no faults- and the garage are bemused too!

Bit of background is the boost pipe from the turbo came loose (suspect been off for a while judging by the oil residue everywhere) so I reseated it. Also the car was Terracleaned which knackered an injector.

Any ideas? Garage say drive it for a while as it may be running too lean and needs a while to adjust
 

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