60K is rather early to change the tranny fluid in this model. Of course MB says you never need to change it but if you plan to keep the car long term I believe a more realistic change interval is every 100K miles. Just my opinion....many here over do this kind of maintenance and I'm not sure it's worth the extra $$$. Good luck with the project.

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99 E300 133K
98 ML320 99K
87 Saab 900 Turbo Conv 123K