Warm heat
Member
Joined: Dec 2018
Posts: 247
Likes: 59
From: Lawrence, Kansas
GL320
Are you sure the engine has heated up enough to provide heat? The diesel take about 10-15 minutes to heat up. The GL has two heater sources. An electric unit that provides heat when the diesel engine is cold and the regular heater core. The electric core is barely adequate in cold weather.
Thread Starter
Newbie
Joined: Nov 2019
Posts: 11
Likes: 0
2008 mercedes-benz gl 320
Are you sure the engine has heated up enough to provide heat? The diesel take about 10-15 minutes to heat up. The GL has two heater sources. An electric unit that provides heat when the diesel engine is cold and the regular heater core. The electric core is barely adequate in cold weather.
Member
Joined: Dec 2018
Posts: 247
Likes: 59
From: Lawrence, Kansas
GL320
If its anything like a W209, the engine must reach operating temperature for the thermostat to open and the heater core pump to circulate fluid.
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Green antifreeze should not be ran in the OM642 because of the various types of dissimilar metals within the engine (Aluminum block/heads, brass/bronze sensors, steel water pump impeller, etc..). When exposed to electrolysis, not having the right amount corrosion inhibiters can cause the surfaces of those metals to pit and corrode over time.
The spec antifreeze for it is MB 325.0 aka Blue G48 or Yellow G-05. Both are relatively plentiful at a local NAPA and cheap.
Last edited by dhurley; Jan 30, 2020 at 03:04 PM.
MBWorld Fanatic!
Joined: May 2015
Posts: 1,932
Likes: 291
From: Allentown, PA
'08 GL 320 CDI
FYI, using green AF wouldn't affect the heat output, though.
What does the engine temp get up to? You can check this in the dash display.
What does the engine temp get up to? You can check this in the dash display.
Last edited by DennisG01; Jan 30, 2020 at 03:45 PM.
