PLEASE HELP - Have been trying to locate the proper routing for the heater hose layout for a 1990 500sl for over 8 mo- no replys or information avail. At my wits end. Purchased this vehicle not knowing the previous owner cut the heater lines and by-passed the core. Hoses cut before mono-valve right side of vehicle and at firewall on left. Have run water through core from mono valve location no leaks detected. I relaced the mono valve and the expensive control unit not knowing the hoses were cut. DUMB on my part for not looking.Please even a photograph would help.
ret9852@yahoo.com