Looking at Autotrader's solection of CPO's:
http://www.autotrader.com/fyc/searchresults.jsp?model=S500&num_records=25&make2=&start_year=2000&keywordsrep=&keywordsfyc=&engine=&certified=y&body_code=0&fuel=&search_type=certified&distance=0&make=MB&color=&min_price=&drive=&default_sort=priceDESC&max_mileage=&style_flag=1&sort_type=priceDESC&address=06460&advanced=&end_year=2005&doors=&transmission=&max_price=&pager.offset=25&first_record=26

$35k is about right, even with the repairs you are about where you should be. Still sucks.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200