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#1
08-03-2001, 02:12 PM
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Looking for coolant drain bolt on M103 block?
I can't seem to locate the block drain bolt on my '91 300E (M103 engine).
I need to drain the ENTIRE system to flush, due to the ATF in the oil issue I have recently repaired. Could someone describe to me please where this drain bolt is located? Thanks! ~~Iodyn  Also, I just received the MB degreasing agent and citric acid powder as I was typing this. They both come in powder form but don't explain how to use it. Should I mix these agents with say, 1 gallon of water, then pour into radiator? Certainly I wouldn't pour the powder in without mixing it with another solution would I? Thanks for your help.... Last edited by iodyn; 08-03-2001 at 02:30 PM. 
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#2
08-03-2001, 03:16 PM
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Looking at the engine from the front with hood up, go to passenger side. Just underneath exhaust manifold, in between cyl 5 and 6. Look for drain plug in this area. 19mm socket takes it out.
__________________
Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein"
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