Is there's any merc techs out there? Currently having issues with the father in law's 54 plate c180k hunting on idle...
It's causing massive headaches.
It's never missed a beat til a few weeks back.
A couple of local garages have had it in and there not getting anywhere with it.
It's had plugs, a coil pack changed.
But I could hear a air leak, a garage has since made a pipe up to replace a pipe that was split under the air box.
But it's still hunting on idle and throwing lights up on dash!!!
I still think there's a leak...
Help, any ideas?

 

what codes?

is it a twin cam sensor model?

if so check for oil leaking from sensors, this runs down the looms to the 02 sensor and other sensor control modules and causes havoc

PM me if you need a chat, will give you my number, i see loads of these with issues

 

maf sensors are quite common on these i believe.worth a check

 

^^ very common, also look for vac leak