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Old 06-30-2008, 03:01 PM
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Join Date: Jun 2008
Posts: 8
Clicking or thumping sound

I own a C320 2003 year model.When I insert the key to ignition I hear this thumping of clicking sound from the keyhole area (dashboard area) it continues for about 3-4 minutes after starting. Can some one help.

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Old 06-30-2008, 03:04 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Common problem on the early W203 c-class.

Try searching on problems with a/c servo motor issues.

Most common problem is a broken footwell flap lever.
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Old 07-04-2008, 02:31 PM
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Join Date: Feb 2004
Location: California
Posts: 16
It may be the purge valve for fuel evaporative system, normaly you can hear it when ideling and the thumping sound like a bad main bearing.
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Old 07-06-2008, 02:39 PM
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Join Date: Jun 2008
Posts: 8
Thanks so much. It was the A/C servo. A footwell flap lever.

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