Like the title says are all 123 sedan rear coil springs the same? I'm buying some new springs from a member here but they are 300D springs. Are the 240 and 300 springs the same? Seems like they would be.

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Well there are the progressive springs for the rear, and have seen them with different part #`s. so I would assume there is a difference in the others also depending what market the car was headed to.

You made go look in my FSM.

Look in you FSM VOL 1 W123, section, 32-240 adjustment of rear springs.
there is a listings of sedans with standard suspension, harder suspention for countries with poor road conditions, ( like our roads are turning into).

your 240 is a 123.123, it lists the spring part# 123 324 06 04. height of spring-rubber mounts according to color code of spring.
Blue - 9.5.....Red - 14.


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I don't know what the book says but I would not hesitate to use rear springs from a 300 in a 240 or vice versa. the Fronts, I believe are different but not hugely. I have a 300 NA in my 83 240 now and am using the original 240 springs. it sits a little lower but works fine. Looks good too.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

That's what I was thinking. The fronts being different make senses due to engine weight, but the rears don't seem like they would be any different.

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Engineers will specify a different spring rate for the rear of a car model with a different weight motor (and therefore different springs) in the front just to maintain the intended steering balance (oversteer/understeer); if you put heavier springs for a heavier motor in the front but keep the same rears, you will get an increase in understeer, because the fronts have to contribute a greater percentage of the roll resistance. Sometimes they use a different rear sway bar instead, though, and sometimes the difference is small enough that you can compensate by adjusting the relative tire pressures.

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Numen tibi adsit!

Here's a load of information I got when I asked a similar question

Which springs are best?

Don't miss post 18 Juane the man!

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!