so the past couple days that it has been cold, when i start up the 240D (in one crank) with temps in the 30's the engine rattles alot. i didnt find out till today that i was the clutch, b/c when i depress the clutch, the rattling goes away. after it warms up a little or if i drive it for 2 second the rattleing goes away when its idoling.f i increase the idol speed when cold it will go away also. when temps are warmer it never does this. is this because the engine is ideling really low because of the cold temps?

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1983 Euro 240D 277K
2016 Mazda 6
Coming Soon, 2013 Mercedes E350 Bluetec
Formers:
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2007 Outlander- complete pile
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2007 VW Passat 2.0T 63K SOLD
2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K
2009 Lexus RX350 9061 miles. Sold 04/09
2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000
2003 Infiniti I35 58K Sold
1984 300 turbo diesel 222K