Power Steering Problem........I think?
10-21-2011, 04:47 PM
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2004 SLK 230, 1992 300E & 400E
Power Steering Problem........I think?
On my '92 400E how can I tell, with the PS Pump still in place, whether I have a Vickers or ZF. I need to order another pump to replace the one I have....I think? It makes a groaning/whining noise around between 15 and 40 mph and it's getting worse. I tried flushing the old ATF out and putting clean, fresh, M-B PS fluid and it didn't change a thing, still groaning. I pulled the accessory belt and checked the idler pulley, it seems okay. Am I missing something? Could it be the steering gear and not the pump. You can, if you pay very close attention, feel a slight pulsing or vibration (sort of a "buzzing" feeling) in the steering wheel when the noise occurs. The noise is intermittent, not continuous.
Last edited by larryj; 10-21-2011 at 04:48 PM. Reason: added more info
