What Mercedes diesel equipped car has an idle adjust?

__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Your '83 240D did before it received the turbo engine. I've never seen a 240D with a manual transmission that didn't have one.

OP: It could be a sign of many things, but you might want to start by checking the idle speed. There's a spec. If it's idling too slow, then yes it's going to be rough. That could be the result of badly adjusted linkage or base idle adjustment, or possibly something more difficult to remedy. It would be best though, if your valve lash is properly set, your motor mounts are in good condition, and your fuel filters are new before you start making any tweaks to the idle speed.

__________________
'79 240D

Most if not all older Benz NA diesels W123 included have a idle adjustment for upping idle until the engine warms up when it's cold out.

yes.. but the engine would still not quit most likely right? the fact that if i adjust the knob all the way down.. and the engine will quit.. i guess i am trying to figure out if that is normal behavior (before i continue going down the adjustments and whatnot).

I know for a fact i need to do a valve adjustment, and the motor mounts should be dealt with too. But, i just want to make sure that is normal operation before i begin..

just replaced the fuel filters, air filter, and oil change+filter.