Let's put things in perspective here - $2K to $3K per year is pretty accurate IF SOMEONE ELSE DOES THE WORK. If you do your own work, like many members here, you might spend half that amount or even less.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280