PeachParts Mercedes-Benz Forum - View Single Post - Very slight cold idle steering wheel vibration

JHZR2 · #1 10-19-2018, 10:21 AM

1991 W126 350SD.

Starts beautifully and strong. No issues or challenges. Short glow, barely crank, idles great.

But when cold, there is ever so slight a vibration in the steering wheel. Just enough to observe a little movement in the cruise control stalk.

Ive never noticed this with any of my w123 cars, even my 240D, which has a pretty strong idle shake when in D and AC on.

This shake in the w126 is so minor that just having a hand on the wheel dampens it. But it is non-existent when the engine is warm, so there is something going on.

What confuses me with this, and why I’m asking, is because I don’t observe anything in my w123 cars, as noted. The 240D seemingly to me has the same type steering system as my 350sd, and it shakes enough at idle (smooth as silk under load) to vibrate thehood). But the steering wheel is rock solid.

Perhaps it’s due to the adjustable column on the w126? Or could it be some mounts or bolts? Perhaps something that once warm, behaves differently?

Thanks!