bad steering rack?
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Senior Member
Joined: Jun 2012
Posts: 409
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2008 GL320CDI (310k), 2017 GLS450 (170k), 2024 Sprinter 2500 (40k)
bad steering rack?
So GL developed this clunk/knock when turning steering wheel, but not all the time. Sometimes it is loud, sometimes not. I have checked all I could think of. I had helper turning the steering wheel while I was under a vehicle watching and listening. We could not replicate the loud clunk, but I could hear faint knock coming from the rack. So, is this common? Am I looking at replacing the rack? It is leaking slowly. I've added a quart over the past 5 years.
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Joined: Dec 2004
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So GL developed this clunk/knock when turning steering wheel, but not all the time. Sometimes it is loud, sometimes not. I have checked all I could think of. I had helper turning the steering wheel while I was under a vehicle watching and listening. We could not replicate the loud clunk, but I could hear faint knock coming from the rack. So, is this common? Am I looking at replacing the rack? It is leaking slowly. I've added a quart over the past 5 years.
Thread Starter
Senior Member
Joined: Jun 2012
Posts: 409
Likes: 22
2008 GL320CDI (310k), 2017 GLS450 (170k), 2024 Sprinter 2500 (40k)
Senior Member
Joined: Aug 2014
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gl450 530i
Thread Starter
Senior Member
Joined: Jun 2012
Posts: 409
Likes: 22
2008 GL320CDI (310k), 2017 GLS450 (170k), 2024 Sprinter 2500 (40k)
I have hear of that PS pump would cause this knock. It is not repetitive, but once in a while I could replicate it by turning the wheels the other way. It is somewhat similar to bad bushings. But with worn out steering rack bushings, the knock was always there and it gradually became louder. With my current issue the loudness and frequency of the issue occurring is all over the place.
