Are the auxiliary coolant pumps on the SRT-6 supposed to run for 5-20 seconds after engine shutdown like the SLK32 and C32 AMG pumps reportedly do? This was listed as a final check out of the new pump on that Benz World IC coolant pump replacement thread:

http://www.benzworld.org/forums/r170...placement.html

If so, then one verification of failure could be lack of the pump running just after the engine is shutdown. Anyone confirm or refute this? This assumes the common failure mode of the pump is the electric pump motor not running, ever. Do they just burn up the windings (open up) or do they mechanically freeze up?

We need better diagnostics of this pump failure to convince some dealerships, based on the dealer problems owners have related in this thread.