I have a 350SDL and with the temperature dial set on hot, there seems to be no heat. With the fan turned off, warm air comes out of the vents to a certain extent. Any thoughts or ideas would be appreciated! Thank you

There are many possibilities. Two very common problems are the Mono-valve and Switchover valve. Both are discussed extensively on the forum using the search function.

__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)

sounds like a monovalve/auxillary waterpump, vacuum issue with the elements or switchover valves, control unit, fuses, or a bad blower motor

__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)