Thanks - I've read the tutorial. Easy as pie for someone with reasonable skills.

Best thing is that the removal process for the actuator on a '92 300SE is about 5 minutes work. There's no crossover tube - the air cleaner is an old carburetor-style unit that sits right on top of the MAF which is connected to the EA on the driver's side of the engine...

I'll let you know what I find.

Regards