Do you have a car with no ac heres a link to a cheap fix instead of those costly MB parts.
http://pg.photos.yahoo.com/ph/wvopowered/detail?.dir=mail&.dnm=909b.jpg&.src=ph

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89 Ford F3504x4CC 7.3 IDI turboed Intercooler and running on wvo now powered by a 1997 Cumins
87 300SDL on bio and wvo killed by chevy truck 5-24-06
1999 E300TD black with gray int.