depends if you're going to do all of them. hopefully you have the CD or shop manual. If you are going to do all of them, you have to take the front of the engine off. Other wise there are a couple at the top end that a lot of people change.

not an expert here, but ended up having all of mine changed when meant taking off the front of the engine on my '86 560SEL

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R Martin
Dallas, TX (Addison)

86 560SEL, 128K