ML320 2002... outsidetemperature dropped this past week to -15degC... suddenly started seeing pools of coolant under the front bumper... I lay under the front end and noticed what appears to be a leak around the radiator hose... or the coolant could be running down teh radiator (hole) and pooling on this clamp (big problem) or maybe just the clamp/hose assembly is no longer holding... is it relatively easy to pull this hose off and install a new one (purchase from an auto parts store)??? or is my problem likely bigger than I appreciate?

Thanks.

 

P.S... Would this be covered under extended warranty? I purchased this with the vehicle..