Quote:
Originally Posted by ifari
Greetings all and Happy New Year.
How do you check or add tranny fluid in a W215 CL500?
I have a low level 'hum' or 'drone' sound when accelerating from 5km/hr - 85km/hr. Above 85km/hr and up the car is quiet.
Any help or insight is appreciated.
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Fixed it! The 'drone' is gone.
It was the ABC Pulsation Damper/Accumulator. Part as less than $200 cdn and 1 hr labour.
No more 'hum', 'drone' or vibration.
The MB STAR SERVICE Service Manual Library DVD states in the DTB....
The ABC Pulsation Damper/Accumulator can correct a 'hum' or 'drone' sound.
If a 'hum' or 'drone' sound up to 2000 rpm is heard, but gets drowned out by the sound of the engine above 2000 rpm, it could be as simple as the hydraulic lines contacting the body of the car.
Have the lines inspected and if they clear the body, then replace the Accumulator.
The dvd manual also specifically states that replacing the ABC/PS pump will
NOT correct the 'drone' sound problem.
I highly recommend buying the DVD from the dealer. It has all repair and maintenance procedures, diagnostic info, function descriptions, wiring diagrams with component locations. Service bulletins and DTB. $100 cdn.
04-18-2009, 03:46 PM
Engine 'hum', vibration sound solution from MB dvd.
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