Got a 88, 190e 2.3. No lights on the climate control panel. How are those controls lit? I didn't see on the back of the panel a way to insert a bulb. Thanks

I believe the lights are in the PBU. There might be a couple of strips of black tape over the bulbs. Remove the tape and use some rubber hose to pull off the bulb.

Sixto
98 E320s sedan and wagon

Question, what's a PBU, push button unit? Are they in under the button?

I take it back. I’m talking about the 124 and late 126 units that have 2 bulbs above the row of buttons. I don’t see the same in the 190E unit.

Sixto
98 E320s sedan and wagon

The later W201 AC control unit has a little panel or door you open that has the two bulbs in it. Not sure if the earlier console uses the same part.

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The date on this pushbutton unit is 1990.
Press the tabs indicated by the arrows with a small screwdriver and lift up.

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Fantastic! Couldn't be clearer. Thanks. Where do you get your bulbs?

I think it these. Yes? https://www.bulbs.com/product/2721

Our host has them.
They are Osram 2721 which is 1.2 watts.
Your link is an equivalent.