84 mercedes 380se
 

I have an 84 mercedes 380 se and was having cooling problems in the summer time. I used a radiator flush kit and seemed to fix the overheating. Now that its cold out and started using the heater and not getting any heat. Could the heater core be messed up or should I look at something else? Thanks for the help. Karl

often
 

when you get an engine hot it will dislodge junk in the system. this lodges in the heater core and plugs it. so no heat. if this is the prob, you might be able to dislodge with reverse flush but usually you have to take out the heater core and have it cleaned or replaced.

tom w