V6 Diesel S320 CDi rough running

Cityfinal

New Member
Joined
Feb 24, 2014
Messages
3
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0
Location
Yorkshire
Your Mercedes
CLS/2007/320 and S320L CDi
Just bought a 2006 S320L CDi with 155000 on the clock. Engine seems to run a bit fast on idle and the it sounds a bit rough, not like the same engine in the CLS with similar mileage I have. MPG is as low as 19MPG up to 27MPG:(. Before I start prodding and undoing things, is there anything obvious particular to this engine I'm looking for
 

WG M-B

Senior Member
Authorised Forum Supporter
Joined
Dec 5, 2010
Messages
3,105
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6
Location
North west london
Your Mercedes
C63 Wagon in black
At 155k you could have injector issues. Any engine lamp on?
 

mersum1es

Senior Member
Joined
Sep 25, 2010
Messages
2,352
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427
Location
Finland
Your Mercedes
W212/-09/350CDI, W219/-07/320CDI, EX:W220/-01/320CDI, EX:W211/-04/320CDI, EX:W210/-01/270CDI
try listen to injectors with probe or something... are engine mounts ok (perhaps no effect to sound but way engine shakes)
 


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