There'a humming sound on my PS pump. My car is a W124 300D 1985 (Euro).

The sound comes out when I turn the stg. wheel to the left only. There's no sound when I turn the wheel to the right.

Could it be the fuild? Dirty filter?


Thanks!

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94' E280 Euro
85' 300D Euro
87' 250D Euro
77' 300D Euro
Manila, Philippines