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Old 11-20-2013, 08:02 PM
shertex shertex is offline
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Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,643
Do you mean overflow tank or expansion tank? My experience with my W124s is that you can fill the entire system from the expansion tank....before starting, make sure you can feel coolant in the upper radiator hose. Turn heat on high before starting to get coolant in heater core. Sometimes I've found I have to put up on ramps with cap off to burp.

If this doesn't work on your W124, maybe also fill engine from upper radiator hose.
06 E320 CDI "Benson", Platinum Blue, 180k mi, Stage 1 tune
06 E320 CDI "Rutherford", Black, 151k mi, Stage 1 tune
91 300D "Otis", Smoke Silver, 132k mi

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