I just notice something interesting -- not sure if it was there all along...? When I first start my car and it is cold -- it sounds as if the fan is reving fast/slow/fast/slow... very odd, but you can definityly tell the difference. This isn't the aux fan either...

Anyone know what this is? Normal?

Pete

Could it be the fan clutch is starting to go out?
Engaging and then disengaging? Might watch the fan speed (a strobe would be great) while it is running at a constant speed.

I'm guessing as you can tell...

__________________
'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique

Hmmmm... fan clutch... I have to do some reading on this... it only happens when the engine is first started...

I'll do a search and see what I find. I added the info about the car to my signiature... hope this gives you more info.