b5 a4 2.8 v6 automatic lost all power

[simeonstokes]

Hi,my a4 lost practically all power whilst driving about 500m from home. Managed to limp home but then died coming up steep drive. Car now starts but idles rough and barely pulls away, dieing again on steep drive. Changed spark plugs and coilpack but made no difference. Smells fumey but no smoke. Any ideas what could be up? I appreciate it could be a wide range if things but I can't find any other questions like this on the net so would like to be showed in the right direction as I haven't got much experience with cars and am skint at the moment. Cheers