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Old 10-23-2007, 08:03 PM
N41EF N41EF is offline
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Join Date: Apr 2006
Location: Aiken, SC
Posts: 204
Yes, draining the radiator will drain the overflow tank. The two electric valves are for the heater. You also need to open the block drain plug, it's on the passenger side at the back, near the O2 sensor in the exhaust. I would also use the citric acid to flush with, then drain and fill several times to clean it out, then fill with mercedes coolant (or Zerex G05) and distilled water. Good luck, Chuck
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