GL Class (X166) 2013-2015 after facelift became GLS (X166)

2014 GL450 Slow Coolant Leak

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Old 08-23-2016, 09:44 AM
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2014 GL450
2014 GL450 Slow Coolant Leak

I lose a 2 or 3 ounces of coolant about once a week. I can't find any coolant elsewhere in the engine compartment.

Has anyone else experienced this and been able to correct?
Old 08-23-2016, 11:04 AM
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Have your coolant system pressure tested, as you want quick resolution!!------all else is HS and misinformation!!
Old 08-24-2016, 02:20 AM
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Blutoe is off base again.

If you are under warranty then get it into the dealer - I think there are two TSB's on potential causes ..
Old 12-09-2019, 05:04 PM
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2013 GL450
Originally Posted by Silver0066
I lose a 2 or 3 ounces of coolant about once a week. I can't find any coolant elsewhere in the engine compartment.

Has anyone else experienced this and been able to correct?
have you found your issue yet?

i had the turbo coolant pipe issue couple of years ago and an indy shop replaced the pipe.

lately i have noticed a slow leak (last time when the coolant pipe went bad the leak was quicker, i'd refill and next day it would be low again), the low indicator would come on every a few months and i have been topping it up. lately i have noticed small puddle (not a lot maybe a few drops) on my garage floor semi-regularly (seems like if i leave the car there long enough i will see some), under the the driver side front pumper. looking under the hood i can see some liquid pooled on the tray around there. took it to another indy but the guy said he pressure tested it and can't find the leak?

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