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1997 E320, 2010 GLK 350, 2011 C350, 1995 C220
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54 Posts
Discussion Starter #1
On my 97 w210, the ac and heat come on, but does not blow...help. You guys think it's the resistor?
 

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1990 Mercedes-Benz 420 SEL(RIP),1997 Mercedes-Benz E420
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1,936 Posts

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1996 E320, 1998 E320, 1997 Acura RL
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19 Posts
Remove the blower and the resistor, and then test the blower with your battery. If the blower works, then it is your resistor, and you can find them online. Your best bet is to replace both units. It is very easy to replace in under mins, once you have the right tools.
 

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1999 E55, 2001 E320, 1990 560 SEC, 2004 ML350, 2001 ML55, 1995 S500, 1998 SL500, 2010 E550 Sport zoo
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7,035 Posts
It is more affordable to replace the blower regulator only - which is best found as a regulator for a W140 - here in US eBay is a good source.

MB later "updated" both the blower and regulator for the W210 - so a "updated" W210 regulator requires a updated blower - but using the W140 regulator and just extending the leads is the most affordable fix.

Keep the beat !
 

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Current 2017 GLE350, 2007 S550, 2002 S430, 1998 ML320 Deceased 74 240D, 92 400E, 97 E420, 13 GLK350
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1,920 Posts
I used a 6v lantern battery to test my blower motor - the car battery carries a huge amount of amp capacity that could damage the blower motor with a direct hookup.

+1 on the W140 regulator - there is a post in the stickies on how to splice it in. That was the route I went. I believe there may even be an update to that post on a part number regulator that does not need to be spliced.
 
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