Coolant and Diff fluids/oils - Mercedes Benz SLK Forum

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#1 Old 11-03-2009
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Coolant and Diff fluids/oils

A dealer just recommended I replace the coolant, brake fluid, transmission oil, and diff oil. Upon checking the maint manual, it says to replace coolant after 15 years, and doesn't mention rear diff.

I knew I had to replace the brake fluid (more than two years old), and trans oil (past due since I have over 46k miles now)

Did I just get taken for the coolant and differential oil change?
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#2 Old 11-03-2009
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#3 Old 11-03-2009
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You certainly did on the coolant as now it probably isn't good for 15 years anymore as the chemistry has been disturbed.

Nothing hurt at the differential assuming correct fluid installed.
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#4 Old 11-03-2009
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Yes you got taken but then it was a recommendation
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#5 Old 11-03-2009
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Something fishy going on here:
A 2002 R170 -- > Every 3 years
A 2003 R170 -- > Every 15 years

I can't recall any engine differences that should lead to 5 times longer intervals
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#6 Old 11-03-2009
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It's the pack of chemicals they put in the overflow bottle.
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#7 Old 11-04-2009
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