Sixto,

I have an SDL but I don't know what the ARV stands for? Air Recirculation Valve? And where is this ARV?

I do know for a fact that the EGR on my SDL and 2.5 Turbo have been "temporarily" nonfunctional.

Herb
'82 240D
'87 300SDL
'92 300D 2.5 Turbo