Heating issues(again)... desiccant bag, flush again?
Newbie
Joined: May 2026
Posts: 2
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2015 GL450
[QUOTE=ChicagoPete;8497351]Hi,
New member here.
GL went into the dealer in early Dec... all 4(?) cooling lines to the turbos needed replacement.
That got fixed and picked up the car and had no heat. Said the desiccant bladder ruptured:
And, I can literally see/watch the temp gauge fluctuate from 80-97, up and down while driving. Temp sensor bad?
Can the replacement coolant bottle with new desiccant bag rupture again?? How would I visually check if the bag is ruptured?What ended up being the issue? I was just quoted 12K for the exact same thing on a 2015 GL450
New member here.
GL went into the dealer in early Dec... all 4(?) cooling lines to the turbos needed replacement.
That got fixed and picked up the car and had no heat. Said the desiccant bladder ruptured:
- Replaced coolant bottle
- Replaced heater pump
- Replaced thermostat
- Flushed entire system
And, I can literally see/watch the temp gauge fluctuate from 80-97, up and down while driving. Temp sensor bad?
Can the replacement coolant bottle with new desiccant bag rupture again?? How would I visually check if the bag is ruptured?What ended up being the issue? I was just quoted 12K for the exact same thing on a 2015 GL450
