I've recently replaced the forward pair of rear subframe mount bushings on my car (1984 190D-2.2) because they were cracked; I can't see the rear pair well enough to assess their condition, but I assume that since they're of similar age (22 years), they're probably also due for replacement.

And that got me thinking about some of the other rear suspension components, all of which have rubber bushings at each end: (53, 74, 95 and 110)


Do you think it would be worthwhile to replace these pieces given their age (i.e. would there be a noticeable improvement in handling/ride), or should I leave everything alone since it's not giving me any trouble now (none of them feel particularly loose, there are no funny noises, tires are wearing evenly)?

I'm getting new winter tires and new summer tires within the next month, so I was considering replacing these parts and getting an alignment prior to installing the tires. The cost of the suspension parts and subframe bushings is only ~$400, so it's not too expensive.

If anyone has experience with the W201 or W124 rear suspension (I believe they share a similar design), please let me know what you think! Are there any tips/tricks related to replacing these parts? Or is this a case of compulsive over-repairing?

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1989 250TD Wagon 5-speed, 160,000mi ::: Dark gray metallic / black cloth
1984 190D-2.2 5-speed, 287,000mi ::: Silver-blue metallic / black MB-tex ::: SOLD

I will just give my experience with my current '92 300E Sportline.
It has 245,000 miles on it ( over 90% long interstate travel ).
My MB indy has regularly inspected the 5 link rear suspension
and pronounced it good. Told me that if I have no handling issues
leave it alone.

I have read that the wear primarily occurs on one of the links.
I believe it is called the thrust link.

Steve

The big issue with worn link bushings is that they actually act as a part of the suspension circuit...there is a calculated deflection in the bushings that carries some of the load. Two things will happen if they are worn...one, you'll have a less-than-perfect ride...and two, you will be putting additional stress on the other components. 22 years? I'm guessing you'd also need lca bushings (inner bushings are rubber and also work with the suspension, outer bushings are metal) also.

You can buy complete link sets on eBay rather cheaply (around $150 each side, iirc) and it will make a huge difference in the way your car rides.

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1973 280 - Current Project Car
1979 240d - 100% Stock
1982 380sl - 100% Stock
1985 190e 2.3 - Heavily Modified