Does any one have this problem, my friend sat in my car and i started the car at cold temperature, he notices that my car was shaking while i was warming the car. is there a problem ?

 

How many miles on the car and when was the last maintenance done?

 

It's common on the TL, mine does it during cold start, it helps warm up the engine.

Mine does it everytime I start it up as well.
I remember seeign a thread somewhere on here and that was the response from everyone...but someone can chime in if I am wrong.

 

Sometimes the engine mounts stiffen up in very cold temps. Nothing to worry about. If the car is at op temps and it's still vibrating / shaking at idle.. check out your engine mounts.. rear mount especially.