To me it is pretty unbelieveable that the coolant has lost it's freezing protection after 30 months. I don't buy it.

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95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K

The only way it would do that is if it was diluted with water.

IIRC on the Zerex G05 bottle it says 5 years / 150K miles.

Yes I know -40 is about the same both in C and F. If he meant 40F that's actually impossible since that's above the freezing point of water. -40F on the other hand, should be sufficient and if I recall correctly that's about 50/50 water/ethylene glycol mix.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

I think the newer coolant (blue in color) used in 2003 has the 5 year replacement interval.

The yellow-ish coolant used in W124 / W210 / W202 / W140, etc. chassis has a 3 year replacement interval.

What's on the Zerex bottle is also independent of what Mercedes requires.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

>

Close , but No Cigar ..

Minus 40 is not About the same , they are Exactly the same..
..and 50/50 H20/EG mix is -34F.

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A Dalton

I meant that the tester showed something like -43 degrees as the freeze point.