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1998 SLK 230
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Discussion Starter #1
simple to check if yours has failed (this applies to any R170). open up the lid to black box compartment in engine bay where ECU is located. turn the car igntion to the ON position (2) but no need to start the car.

go back to the box and move your hand around the top (dont touch anything) and see if you can feel any airflow and or hear the fan spinning. if not it has failed.

to fix this, 2 options. 1 buy a new fan from dealer (a lot of $$ for something so simple), or 2 replace the electric motor inside. i found this one on ebay and confirm it works. simple to do with a person with some know how.

MM36 DC ELECTRIC MOTOR,HIGH TORQUE,12V TO 24V,FOR WATERPUMP,FAN,ELECTRIC CAR ETC | eBay

replace the motor and re-solder the wires put it back together and done. reason for the failure (i opened up the old motor) is basicly wear and tear the motor has reached its life cycle. given how many of you have this car and the age yours will or has failed.

cooling the ECM/ECU is important especially on left hand drive cars where the ECM/ECU compartment is near the exhaust manifold...

these few bucks can save you forking out thousands on a new ECU/modules....

please check yours!
 

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1998 SLK 230
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Discussion Starter #2
one thing check the polarity of the motor before your solder wires so its blowing from the outlet, and sucking from the center before you put it in the car. if its wrong just solder the 2 wires the other way around.
 

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SLK 200 Kompressor
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How to remove the blower motor?

Subby- I need to remove my blower to put a new electric motor in, but I can't see how to detach it (the complete blower+ housing) from the body of the module box, even though I have got all 3 modules out and the module box is otherwise empty. Does the moulded tube attached to the blower need to come out at the same time? I'm obviously missing something, and would be really grateful for your advice.
 

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1998 SLK 230
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Discussion Starter #4
you can do it with all the modules in. the only module i removed was the K40 relay. (the one with the fuses in it).

slide up the big fuse (50amp) one on the side up out of the way too... undo the metal clip holding the top of the blower and pull up... as you pull up seperate it from the intake duct going to the blower and out it comes.

with the install lift the duct up as much as you can and as you start to slide down the blower pop in the duct and then push them both down
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Subby,
I am looking at doing same thing on our 98 E320.

The motor speed of 14350rpm seems very high. My blower is a Bosch (APK 12V 0130002837) but it doesn't sound like it goes at that speed.

Later cars used a TYP RV40-18/12GU-013 13.2V. That seems a special model, but the RV40 series seem to run at 4500rpm (http://www.farnell.com/datasheets/73475.pdf)

Can't find specs for the Bosch blower
 

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1998 SLK 230
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Discussion Starter #6
it will spin a bit lower once it gets under load (fan sucking from inlet).

it still draws little current so its not an issue... when you open up the box and put your face over it, it blows a LOT of air. with the box closed you can only hear a very, very slight "hum" if you like if your 30cm away from the ECM box in the engine bay

to me more cooling is better... this is about as close as your gonna get with an aftermarket electric motor without replacing the blower as a whole.
 

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Blower removal

Thanks for that, Subby- I just used brute force& got it out....but looking at it on my desk, I think it is different from yours in that the casing has been changed, making it difficult to get at the motor -photos attached, plus a 3rd photo showing how the motor is fixed into its casing by fixings not easy to deal with. Incidentally, with the foil covering the outer end of the motor spindle peeled off, you can see traces of what looks like spindle lubricant behind it.
Looks like maybe I'll just have to shell out for a new oem motor unit...:banghead:
 

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1998 SLK 230
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Discussion Starter #8
yep diff manufacturer did that blower.

still might be able to hunt down an electric motor to fit. slide a thin screw driver under the impeller and try to slowly pop it off. you may be able to see screws which are used to screw the motor on to the casing?
 

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blower motor--returned to ebay seller....

Hi again Subby- just to wrap this up for me, I contacted the guy who I had ordered the replacement motor from (the Ebay link you provided) and he immediately and without any hesitation agreed to cancel my order & refund my paypal payment! An ACE :bowdown: and I recommend him warmly to others.
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Thanks for that, Subby- I just used brute force& got it out....but looking at it on my desk, I think it is different from yours in that the casing has been changed, making it difficult to get at the motor -photos attached, plus a 3rd photo showing how the motor is fixed into its casing by fixings not easy to deal with. Incidentally, with the foil covering the outer end of the motor spindle peeled off, you can see traces of what looks like spindle lubricant behind it.
Looks like maybe I'll just have to shell out for a new oem motor unit...:banghead:
It looks like you have the Papst blower. You can buy one with similar dimensions but slightly different number at various on-line locations for $50-$60.

The original blower out of my 98 E320 is a Bosch 0130002837 (MB A2105450495) and it takes a motor similar to the UK hobby motor. I read that the blower for a 2001 E320 is made by Papst (TYP RV40-18/12GU-013 13.2V) and part is A2105450595. EPC says this is for E211. Papst make a generic almost identical blower with part numbers TYP RV40-18/12H or L which is less expensive.
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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it will spin a bit lower once it gets under load (fan sucking from inlet).

it still draws little current so its not an issue... when you open up the box and put your face over it, it blows a LOT of air. with the box closed you can only hear a very, very slight "hum" if you like if your 30cm away from the ECM box in the engine bay

to me more cooling is better... this is about as close as your gonna get with an aftermarket electric motor without replacing the blower as a whole.
There is a circuit board inside my blower that feeds the motor. Incoming wire from plug connect across small component at bottom of picture. Did you keep this circuit board and do you know what it does?

ADDED: After a little research, it appears this would be an LC Filter to remove noise from brushes.

ALSO ADDED: Don't know about SLK, but on W210, housing mount for blower will only accept the old style blower with smaller diameter motor. Only fix other than a new blower would seem to be the motor replacement. It would be nice if we could somehow find that exact motor or one with similar specs. Has anyone found the specs on the Bosch blower?

I did find these motors. Seem close in specs to the Papst L fan?:

http://www.crouzet.com/english/catalog/dc-motors-dc-direct-drive-brushed-motors-24-4-mm-1-4-watts-1-4-w-Part number-82710001.pdf#zoom=100
http://www.crouzet.com/english/catalog/dc-motors-dc-direct-drive-brushed-motors-27-5-mm-3-2-watts-3-2-w-Part number-82720001.pdf#zoom=100

Haven't found anyone who stocks them :( Maybe Digikey will get me one? Do you think the 27.5mm one would fit?

 

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It looks like you have the Papst blower. You can buy one with similar dimensions but slightly different number at various on-line locations for $50-$60.
Hi MBG- Good of you to point out that these blowers can be had cheaper from different sources- much appreciated:bowdown:
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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New blower on the way

Couldn't locate the "L" in stock on a UK Web store, but plenty of the "H" type. There doesn't seem to be any difference in power supply specs between the two, just the L pushes more air through (and has shorter life expectancy:eek:)- so I have ordered one on-line for delivery tomorrow- cost about 20% of the MB list price:thumbsup: I reckon I owe you (AND SUBBY, for all the really helpful stuff he has posted on here over the years) a pint or two each:)
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Took the motor out of my blower and it is made by Johnson Controls. I can't read the number properly but it seems to say 12V, 327 220 259, 362841. Do you see something similar Subby?

Couldn't find that number on Johnson's site, but they did have the motor in the pdf, which seems close. Next thing is to see if I can buy this motor in small quantities.

PS: Dunk -Hope the blower fits properly. If not, maybe you can switch parts to your housing.
 

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Hope the blower fits properly. If not, maybe you can switch parts to your housing.
That's the plan- it looks as though I should be able to retain the section of the new casing that the motor is fixed in, and swap over the other half from my original casing.
Best of luck with your hunt for a blower for your car.
 

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1998 SLK 230
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Discussion Starter #18
yep thats a top ebay seller.... yes i kept that little circut board, and my original motor said just "johnson" on it, no part numbers which i could see.

i did think about using other motors (but the ones which i found in OZ) were either too long or too short. and the small ones didnt generate enough rpms when under load to sufficiently cool such a large box. and they were only rated for 9v.

the larger motors were good (low amp and rated for 12v) but they were too long to fit in the casing. i could have got it to work, but would have meant customising it and a lot of mucking around

this ebay motor went straight in, no mods (no cutting or alterations) for the bosch blower!

i dont know about other countries but a replacement ECM fan from the dealer for this car is a lot of $$ for something so simple!
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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this ebay motor went straight in, no mods (no cutting or alterations) for the bosch blower!

i dont know about other countries but a replacement ECM fan from the dealer for this car is a lot of $$ for something so simple!
Lowest price I could find in Canada was $300.00! In USA, lowest was about $200. And all it needs is a little motor worth $5-$15. And Papst sell a superior blower for $45:confused:

If I can't get the Johnson motor shown in the pdf above, I may get this one:

QJT-360S-14280: NICHIBO TAIWAN CORP.: Electromechanical

They both have rpm in the same range as the Papst that MB now uses. Don't know for sure, but the Johnson is probably better quality that the Taiwanese one..

I checked and the Papst fan and motor would just fit in my housing, but not sure I could get the mounts to work. It is a much better blower with ball bearings and long life expectancy. The Bosch has bronze bearings and it seems on mine that that is the problem. They were squeaking and seize at times. I bought a spare from Germany that was DOA. Same problem. Fan runs fine after lubing, but can't keep doing that!

Anyway - this thread has been very useful for a W210 owner. Thanks for letting me in :)
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Just another little piece of info:

BMW (and probably others like VW and Audi) also use the same (or a very similar) Bosch blower.

I found two BMW blowers that come with a flange that is part of their module casing. They cost $72-$129 on-line in USA. Parts 12907571019 and 12901438062. The connections may not match our cars. Need to compare them carefully. The motors are likely the same.

But, I am still going to change the motor on my blower.
 
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