Adjusting ride height - Mercedes-Benz Forum
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post #1 of 24 (permalink) Old 04-19-2019, 01:22 PM Thread Starter
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Adjusting ride height

I know there are lots of threads on the various ways to make adjustments, and the real correct way being a proper airmatic calibration.

However, I have had a mismatch in my ride height since I got the car. I have taken it to a couple of independent specialists who have done ride height calibrations and it's still pretty much the same. I spoke to the dealer and the service person I spoke to said they wouldn't simply do a ride height calibration, they would start by looking into why the height is uneven and proceed from there. Makes sense, but I am a little concerned about how quickly dealers can get expensive.

You can see in the photo below, my front driver side is too high. I have checked on very level ground and it's the same. The passenger side front looks normal. I have checked the sensor linkage and the sensor arms and it all looks normal.

So, I bought some lowering links (Ghost). My plan was to make minor adjustments. Not to lower the car too much, but to get it looking as close to stock as possible. My aim is stock.

Does anyone have any comments on this? I am wondering what the risks are if any? Once I have it at a good height and it's stable after a few drives I was going to get an alignment done.

This car isn't a daily driver. I walk to work. It's purely a recreational thing that I don't use very often. If it was a daily driver that I depended on I would probably go the dealer route.

Thanks
Oliver
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Last edited by oliverp; 04-19-2019 at 01:22 PM. Reason: typo
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post #2 of 24 (permalink) Old 04-19-2019, 03:26 PM
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I would spend a lot of time on the front ride height sensors before doing anything else. It wouldn't take much bend or misalignment in the linkage or the sensor to cause the problem. It might not take much adjustment to fix the problem.
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Wally
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post #3 of 24 (permalink) Old 04-20-2019, 01:55 AM
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Hi,

Just to add to what Wally says, first off if the rest of the Cars corners are correct I would be comparing V readings between Left Front and Right Front, in SDS Actual Values .............

If they are different carefully compare the linkages, especially if the Car has had the Upper Left Wishbone replaced with a cheapie, I've seen the holes drilled in the wrong place

If you are convinced Linkage is OK, then fit a new Genuine Sensor, and get it Calibrated, you need a real good Indie for this !!

Please don't fit those stupid lowering links, they are a bodge, the Cars never came out of the factory sitting like that
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post #4 of 24 (permalink) Old 04-20-2019, 03:38 AM Thread Starter
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Thank you both, I will spend some more time troubleshooting first. I'll go down and actually measure things either side (like the sensor arms and distances between various components).

Dave, the exact symptoms are the front left high. Front right looks normal, rear right looks low and rear left looks normal. I don't remember exact readings, but when I plug in SDS, the numbers seem to match what I am seeing. I don't know exactly what the numbers mean, but the differences in each number match the symptoms.

Maybe like Wally says the front left sensor arm is bent, so it's shorter - but I just haven't seen it yet. I wonder if it's possible that the top control arm/wishbone is bent down?

I will carefully compare each side.

I really don't want to do anything that isn't stock. As well as it looking odd, I am wondering how if affects the ride quality.

Thanks
Ollie
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post #5 of 24 (permalink) Old 04-20-2019, 04:00 AM Thread Starter
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OK here is another update with photos. The bad side does look a bit different. At the very least, the sensor arm doesn't seem to be properly on the ball joint.
Does anybody notice anything else of concern?
The good side has the Arnott logo visible on the strut. The bad side has the white grease sprayed around (this was me a few months ago).
Thanks again
Ollie
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post #6 of 24 (permalink) Old 04-20-2019, 06:22 AM Thread Starter
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Actually looking closer, I wonder if I need to loosen the bracket at the control arm and rotate the sensor arm counter clockwise a bit?
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post #7 of 24 (permalink) Old 04-20-2019, 07:23 AM
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May just be the angle of the photo (although you did a great job with them), but it looks to me as if the fastener between the bottom of the link and the sensor arm is at an angle.

Wally
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post #8 of 24 (permalink) Old 04-20-2019, 07:37 AM
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Hi @oliverp ,

I've studied them pics until my eyes hurt, and I really don't spot anything there that is too far out and would cause this

My money is on incorrect Calibration

You will find that when the Left Front is at the correct height the Right Rear should come up a little, Rear end only has one sensor and raises or lowers the Rear Shocks according to an average computed by the Airmatic Controller


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post #9 of 24 (permalink) Old 04-20-2019, 07:37 AM Thread Starter
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Thanks Wally. I just sprayed the top and bottom bolts with some penetrating fluid. I'm going to let it sit for a bit and then see if I can loosed and adjust everything
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post #10 of 24 (permalink) Old 04-20-2019, 07:38 AM Thread Starter
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Thanks Dave. I will try and have a play with the linkage and I may have to give in and take it to the dealer if I can't fix it!

Or, I might swap it for a W140
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