that would overwhelm all the hoses in the system..

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I always assumed it had to do with the manual climate controls. Maybe the manual valve the 240's use is less of a restriction than the monovalve so it requires less pressure to flow the same amount of water. Just a theory though.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

Do I even need an AUX pump? I've fitted a manual climate system from a Euro spec 300TD into my car.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

Only you can make that call. Some have removed them and said they could not feel a difference, I on the other hand was cold in my 79 300D until I replaced my bad one which made a HUGE improvement.

I don't know what switches the power to the pump however, does your pump still work with the manual system? If it is working I would keep it, it could only help. Be sure however to add a fuse in for it. There a details of this in the forums and it is VERY important.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

I think I'll just delete, I live in So Cal...not much risk of frostbite. ;-)

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

Fair enough. Keep it on a shelf for later though. You never know.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

Here's the Aux pump that this site lists. I'm not even putting it on my wish list.

1984 Mercedes-Benz 300SD Base Sedan - Water Pump, Thermostat & Hoses - Page 1

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

The "replacement aux pump" in my 84 & 85 300D is a length of 5/8" silicone heater hose. I still get ample heat and noticed no difference. None of my U.S. cars have such a silly device, but perhaps northern Germany is different. The aux pump can clog or stop spinning, thus blocking the flow or leak your coolant on a long trip and ruin the engine. It can also overheat the push-button switch and cause a dash fire. One aux pump was still working fine (no shaft leak yet), but I still pulled it. One W123 guy here installed a cheaper W124 heater control valve (mono-valve) where his aux pump sat, which is another option.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

This thread has some info on fusing the Auxillary Water pump.......
and why it should be fused.

I lost it all....electrical fire high up in the dash


Yikes!!! I guess that pump is pricy.



Auxiliary Water Pump - Climate Control


Brand: Genuine Mercedes

Part Number: 000-835-69-64-M22

$678.00



Charlie

sent from my pos computer

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works