Quote:
Originally Posted by shertex
The one thing I've wondered about is why the drain interval is longer for the G48 than for the G05.
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MB Coolant was same as G05 up to 2012. (See TSB below). The inhibitors are IN the coolant. Coolant needs too be replaced every 3 years on many models so as to replenish inhibitors. Change interval is whatever car manual says. I just went through researching this for my 98 W210. Used Zerex G05 which is sessentially what car had when new. I use same on my 85 300D and 72 R107. Not sure what my GLK250 has, but it has no regular service requirement.
MB went to the G48 coolant in 2012. Some cars have an inhibitor puck that slowly releases inhibitors into the coolant. Then the change interval becomes 15 years.
The spec is 325.0 and that is still good for cars up to April 2014. After that, spec is 325.6 and it is good for all cars, according to to Spec310.1 It is designated as G-40. Confusing eh ?
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5