Car runs better in the rain - MBWorld.org Forums

Apr 23, 2015 | 04:43 PM

mis3

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2004 CLK320

Car runs better in the rain

I noticed that my w209 (2004 CLK320) runs better in the rain.

This is strange. I know that old spark plug wires could impact engine performance negatively due to insulation issues.

I will change my plugs soon and I have to decide if I should change the plug wires as well. To change the plug wires will cost me $500-600.

Apr 23, 2015 | 10:48 PM

Rudeney

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NO LONGER ACTIVE

Define "runs better". Do you have problems when it's not raining?

Apr 23, 2015 | 10:52 PM

mis3

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2004 CLK320

Quote:

Originally Posted by Rudeney

Define "runs better". Do you have problems when it's not raining?

The engine seems more smooth and more power when raining.

Apr 24, 2015 | 11:46 AM

mrbobby

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From: Kingsville Ontario (South of Detroit)

2003 S500 4Matic (SOLD) + 2004 S55 (SOLD) 2005 CLK 500 Cabriolet 2008 S 450

After I wash the car it always run better???

Apr 24, 2015 | 02:04 PM

Fatz

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From: Atlanta Metro

2008 clk550 - Navigator - Frontier

I would also check the air filter. It is generally cooler when it's raining, and the air is more dense. The engine could get more of what it needs from more dense air of the same volume.