loved Alfa, now
suffering a Mercedes
Join Date: Mar 2008
Location: South Cheshire
Re: 159 diesel
I would pop the hood and check all fluid levels. If all is well and the engine develops full power, flatten the accelerator and see if you get over 3K rpm, otherwise it's reverted to safe power to get you home. In that case use the car only for essentials.
Otherwise if all seems well then call the dealer on Tuesday ASAP and get it looked at.
I had three reversions to emergency power before they changed the inlet manifold on my 159 Lusso (Something to do with rust developing in a hinge so don't take any crap or waffle) It's a known problem so get your dealer to look at it.