I have a 1980 300D with non heat and I have the dreaded servo. What are the trouble shooting steps and what are my options on upgraded replacements or a bypass system that allows me to keep a/c. I need the a/c here in FL I only need heat maybe 2 months a year.

anyone seen or used this or something similar?

servo elimination kit for the 107, 116 and 123 chassis

http://cgi.ebay.com/ebaymotors/Mercedes-107-116-123-New-Climate-Control-Kit_W0QQcmdZViewItemQQcategoryZ33548QQihZ008QQitemZ180028012793QQrdZ1QQsspagenameZWD1V

There are lots of options, but the best is probably to purchase a replacement Servo. BTW, you can find those kits for a lot less than $600.

I would hesitate to get anything from somebody who gouges you so much on shipping.
When I got my '77 300D parts car, there was a manual valve with a turn-knob for directing coolant flow to heater core. Then you just have to make sure you have fan control.......

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

I installed a cable operated heater valve for under 20 bucks.

that appears to be the Unwired conversion kit which member moorewr seems to be happy with. Will consider it myself depending on the assessment of the body of my 300SD

ACC Servo 77 300D Upgrade

__________________
1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)