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Old 11-04-2009, 05:43 PM   #1 (permalink)
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BG Fluid Services

Forgive me if this is a repeat question...but a search of the archive rejected "BG" because it doesn't meet the three letter minimum.

Anyway, I had my (new to me by one week) '06 CDI in to the local dealer today for CEL...turned out to be one bad glow plug and they replaced all of them.

Of course the service advisor was eager to sell additional work...and with 36K on the clock, I decided to go for the BG transmission flush and differential lubricant (being due at 39 or 40K anyway, depending on what you read)...also power steering flush although MB doesn't seem to require it. However, based on some excellent information from one of you, I declined the BG cooling system change...having been persuaded that it's really better not to replace the MB coolant earlier than the massive 15 years and 100+K miles recommended interval. If I continue the BG changes every 30K, they say they add some additonal indemnity against component failure, up to $4,000. I also wormed a 20% discount out of the service department.

So...what's the consensus? Did I do the car any harm? Or did I just waste my money? Or was this potentially a good move?

My only concern is whether the BG product meets MB spec...but would an MB dealer sell it if it didn't?
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Old 11-04-2009, 06:01 PM   #2 (permalink)
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You just FUBAR'd your transmission!

Your entire transmisison, torque converter, cooling system and sump will need to be completely purged!

BG does not meet ANY GERMAN CAR MAKERS TRANSMISSION REQUIREMENTS!

To double up the Screw job you got MB does not require any external equipment to flush the transmission! The purge is done using the internal fluid pump by simply routing the fluid cooling return line to a catch can. The total purge requires approx 12-14 quarts of fluid MEETING THE MB SPECIFICATIONS!

Buyer beware!
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Old 11-04-2009, 06:29 PM   #3 (permalink)
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I don't trust the BG products on my MB. On my other older cars I think their fluids and flush machines are O.K. My dealer stocks some BG injector cleaner but when I asked them about the MB labelled one, they had no clue. Once I got the product number from here they special ordered it for me.
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Old 11-05-2009, 12:09 AM   #4 (permalink)
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I am stunned by this thread. I have gone to extreme measures to protect the 722.x
transmissions in two of my cars and I will not use anything but the MB fluid. I had MB
cover the cost of a 722.x transmission and from that point forward took it upon myself
to learn everything I could about taking care of them.

Was this an MB dealer or a used car seller/dealer? I have been to lots of MB dealers and never
seen anything from BG for the transmissions.

I have done the complete 14 liter flush on the E500 and do 4-5 liters on the ML very 30-50k miles.
I am getting ready to do a complete flush on the ML letting the internal pump do the
job and then get all new fluid in there. I have something like 38-40 liters on the shelf.
I get them when I see the latest ATF part# 001989680310. It replaced 001989450310.
The two blend fine if one is just doing a 4-5 liter change of the fluid and filter.

The best thing to do is park the car. Get all of the BG crap out of there. Then do the 14
liter transmission flush/fill with MB fluid.

Here is PDF of a TSB regarding a jolt problem. You can disregard the jolt info. It contains
the procedure for getting fresh MB fluid in the transmission the way Drivbiwire mentioned.
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File Type: pdf Transfluid.pdf (137.2 KB, 159 views)
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Old 11-05-2009, 04:59 AM   #5 (permalink)
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Yes, it was an MB dealer who did this work.

I think I will call MB USA to hear their opinion.

I cannot believe that an authorized MB shop would sell something that would ruin a vital component of their cars. If that's the case, MB USA should crack down on them and hard.

Thanks for the responses.
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Old 11-05-2009, 06:02 AM   #6 (permalink)
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maybe they are not using the wrong fluid but just using the BG machines cause they dont know the other method???
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Old 11-05-2009, 06:36 AM   #7 (permalink)
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Quote:
Originally Posted by BlackOpalCDI View Post
maybe they are not using the wrong fluid but just using the BG machines cause they dont know the other method???
Possible but if a machine is not recommended, I would conclude they used the wrong fluid/filter also. Did they reinstall the magnet?

I did mine myself and bought the fluid direct from MB at $20+ / qt to insure the fluid and filter met MB specs for the E series transmission.
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Old 11-05-2009, 08:05 AM   #8 (permalink)
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If you have the 5-speed, use the Mobil 1 Synthetic ATF, it's approved under multiple MB certifications...$8.00 a quart!

It's what I use...
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Old 11-05-2009, 10:07 AM   #9 (permalink)
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If you shake a can of any BG product it will rattle.

That's the token the mechanic gets and redeems via a catalog of "prizes" from BG.

See the incentive?

There's more: Tips for new car shoppers, drivers and owners. Mechanic’s Tale: Flushing Redux - The Car Connection
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Old 11-05-2009, 06:35 PM   #10 (permalink)
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Quote:
Originally Posted by drivbiwire View Post
If you have the 5-speed, use the Mobil 1 Synthetic ATF, it's approved under multiple MB certifications...$8.00 a quart!

It's what I use...
And none of the MB Sheet certifications for Mobil 1 Synthetic ATF are good for this transmission. It needs 236.10 and preferably 236.14. Go buy some Fuchs TITAN ATF 4134 which is 236.14 and can be had for $37 for 4 liters.
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