Roblove27

My 2005 mercedese benz ml 350 has no heat the lights are on the buttons to regulate the temp but there is no heat

Plutoe

You have many choices---three are--move to a warmer climate or get the car diagnosed or live with the issue and bundle up

vmystikilv

If its still blowing air, i bet $1 its the blend motor that is next to the passenger airbag.

hyperion667

2:10 might be your issue?gl

KrustyKustom

What he said. the blend door motor is the culprit...about a 30 dollar part but a booger to get too....

vmystikilv

Maj. Dundee

Here are thing to do before replacing anything.

1. run eng. to operating temp. and check to see that both heater hoses at the firewall are hot.

2. feel the hose completely at the Coolant Expansion Tank to see if it is hot.

3. turn off eng., turn key to pos. #2 and feel with your hand that the Coolant Circulation Pump is working. If not, remove two wire connector from pump and check to see that there is 12V at the WHITE wire. If there isn't 12v, then the AAC Control Module is faulty and it must be replaced. If there is 12v, and the pump is not working, then the pump must be replaced.

4. depending on the results above, remove the glove box and with a long flat tip screwdriver, pry out the metal rod and manually move the rod in the opposite direction and you will get heat. And the Blend Door Motor must be replaced.