New Bilstein B8 struts - what a difference! - Mercedes Benz SLK Forum

General Modifications R171 Details that make your car different

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#1 Old 4 Weeks Ago
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New Bilstein B8 struts - what a difference!

My 09 came with the AMG sport suspension and when I bought it 2 years ago w/ ~32k miles, I could tell it was under dampened. A year later, one strut was leaking so I started working on replacements (not easy to find a set of B8s!!!). I planned to install them over the winter, but spent the time working on my garage (insulating) - this year the struts were noticeably worse with 5k miles. Last weekend I figured a had a little spare time so I swapped them in with new mounts. Wow - amazing improvement! These are what the car should have come with from the factory. The originals were Delphi 22215322. I have a rear pair on order (hopefully!) as I was unable to find any last year. We'll see.

These were some of the easiest struts I've replaced - little tricky compressing due to the extremely short springs. I have a Branick 7600 and it would max out just before fully releasing the nut.
Durkatlon and Avel Du like this.
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#2 Old 16 Hours Ago
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Their B12 kit rides & handles so much better than the AMG suspension. Who would have thought?
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#3 Old 15 Hours Ago
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Although the AMG setup feels quite stiff it is not really so. I have a film of somebody riding behind me in the SLK55 filming me and see that the back is really doing a lot of vertical movement. Especially compared to some Porsches in the same group back then.

Should that improve with a Bilstein B8 or B12 setup?
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#4 Old 14 Hours Ago
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All I can tell you is that after the B12 kit went in with both the B8 shocks/struts and the 1" lowering springs, even wifey said she noticed the improved ride quality on her butt dyno. She said it was less harsh. And considering I'm running shoes that are low profile 19's, that's saying something.


It was surprising that she even brought it up, so clearly she felt a difference. Best part was recovering most of the cost by selling the AMG parts on fleabay.


There are a few other guys on the forum with the B12 kit installed. Maybe start a new thread asking for comments before making a decision.
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