This is normal operation on some if not most Benzes made int he last 20 years or so. It is this way to warm the cat's faster if I remember correctly.

My 1992 300CE does this as well as my dad's 1994 SL600. My brothers 85 380SL Does it too I think....

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon