Hoses on my '92 300TE were replaced this year. Upper and lower radiator hoses were soft. I think 6 years is a bit aggressive for a replacement schedule but ten is not -- and of course, one must inspect as well in an exercise of common sense.

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Alan Weinschel
2001 S500 Capri Blue
2004 E320 4matic Wagon Tectite
1992 300TE 4matic Black Pearl
2000 BMW 540ia Anthracite