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2008 E550 4Matic; 2011 ML550 4Matic
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147 Posts
Discussion Starter · #1 ·
Auto part Engine Automotive engine part Metal

It's 2005 E320 4M, with 128,000Km
. Water pump damaged so I changed and filled up G-05 coolant.

But my question is, why there is rust on water pump? Is that normal! Or the coolant failure? (It is said 15yrs/150,000mils protection)


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E350 4M 06
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2,744 Posts
You didn't mention the mode of failure, if air got into the system, some rust will form, nothing to worry about.
Your coolant is still good, it gets replenished from a pack in the coolant bottle
 

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2008 E550 4Matic; 2011 ML550 4Matic
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147 Posts
Discussion Starter · #3 ·
You didn't mention the mode of failure, if air got into the system, some rust will form, nothing to worry about.

Your coolant is still good, it gets replenished from a pack in the coolant bottle

Thanks Roadking, I have another question, how long I can store the rest coolant? Usually I will re-use it after 5years.

LoL


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E350 4M 06
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More than 20 years, I recently found a Prestone bottle from 20+ years ago, I tested it with a floating ball gadget and it was fine.
 

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2008 E550 4Matic; 2011 ML550 4Matic
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147 Posts
Discussion Starter · #5 ·
Product Water Liquid Fluid

For the peace of mind, I decided to flush the whole cooling system and use the OEM product.

I went to dealer in Vancouver Canada, to my surprise, they are selling the newest coolant G40, which fits the sheet no. 325.5, and the part number is BQ 1 03 0005.

one jag is 3.78L for $29, just $2 above the regular blue one. It is pink color. I will do flush and fill this in.

I check on Internet and this is the original coolant for 2014+ Mercedes.

Hope it is far better than the old one.


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1922 Ford T no OBD, no ECU, no SCN
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I have been really impressed with MB coolants to the degree that I am using them in my Ford truck.
How bout hauling 23,000 lb set at 95F outside and the engine fan not coming unless I hit 1 mile grade?
Removed mechanical fan from our 1998 E300DT 5 seasons ago and 114F desert is not a big deal for good coolant.
With new stuff double check all the corners.
Took us some time to find a MB note saying that pee and blue coolants are mixable.
 

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Registered
2008 E550 4Matic; 2011 ML550 4Matic
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147 Posts
Discussion Starter · #8 ·
I have been really impressed with MB coolants to the degree that I am using them in my Ford truck.
How bout hauling 23,000 lb set at 95F outside and the engine fan not coming unless I hit 1 mile grade?
Removed mechanical fan from our 1998 E300DT 5 seasons ago and 114F desert is not a big deal for good coolant.
With new stuff double check all the corners.
Took us some time to find a MB note saying that pee and blue coolants are mixable.

They are NOT mixable. The salesman warned me and instruction on the bottle. I have flushed the whole cooling system and then filled last night. So today, everything is good.

:)


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