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Old 01-19-2009, 10:47 PM
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Lowering an SD

If anyone is planning on lowering an SD via cutting the springs, don't just cut 1 coil front and rear. The rear will be squatted bad. I luckily had several sets of springs to play with and get it right.

I found that 1.25 coils in the front and just over a half a coil in the rear will bring it down about 1.5" equally.
81 300SD daily driver/project
86 420SEL (sold)
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Old 01-20-2009, 06:39 AM
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It all depends on how worn out the springs are. for example I did one coil front and rear on a 500SEL and put in 1-bump pads all around and it was perfect.

1980 500SE/AMG Euro
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1983 300TD
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past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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Old 01-23-2009, 10:21 AM
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Yes this is correct, but I did it with 2 sets of springs both from SD's and had the same effect. My original springs were not sagging. It still had a fair amount of rake. My guess is the weights may be different enough on the diesels to make it different. Mine was also done without changing the spring pads. 1 nub in front and 2 nub in rear
Probably the reason the HR springs specify not for diesels.

On a side note. I just weighed my 81 SD, 3740 with about 15 gallons of fuel and no driver.
81 300SD daily driver/project
86 420SEL (sold)
85 380SE(in the graveyard)
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Old 01-25-2009, 11:05 PM
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Location: Chesepeake & North Jersey
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wait a minute this confuses me regarding lowering a SD over an SE (W126 obviously), I installed a set of Eibachs on my friends diesel and it lowered the car quite nicely 1.5" with a small rake, 1 nub front 2 nub rear shims... Is there that much of a difference in Gas and Diesel Spring rates to matter when lowering the diesel?
"Why operate within the law when you can operate above it?"

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Old 01-26-2009, 10:27 AM
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Why would there be a difference between gas and diesel as far as the springs go? Are the weights a lot different on the two?
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