Question about 1999 Mercedes-Benz E-Class

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Ticking noise from engine--sticking valve? E320 1999 165 000 miles

I recently bought a 1999 E320 and the engine was not noisy in the beginning and not very audible in street traffic. I made a mistake? after opening the hood I heard a ticking noise but by then it was too late for remedy the owner, original byuer with all maintenance records and keen in keeping the car top fit, was surprised and said he did not hear it either..
Well I am stuck with it now...

A brief mechanic eyeballing suggested it may be a stuck valve..the engine purrs and responds fine. After startup (cold) the engine doe not audible tick but after a mile or so it is noticeable when the window is down or when idling with the hood up. Oil Check OKay Mobil1 5w30 syn
Engine runs smooth good pick up and fuel economy.

Help Grischa
Do I have a big problem? What is a reasonble remedy.

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  • xanthe NZ Jul 05, 2008

    I have the same noise in my 2003 E320 (W211) but have traced it to a vacuum solenoid valve in the left front of the engine bay below the air intake and connected to the engine in the vicinity of the inlet manifold.. I seems to have no adverse performance effect though?



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