Dancing gauges are hit and miss. Norm and Zippy don't, but Ol' Turbo does after a long trip. I don't think it has much to do with anything maint, but at some point the gauge changed from direct to computerized. Could be the W124 has that upgrade, but I'm not sure.

I'm pretty sure all 3 have delay interior lighting and standing lights (if you mean the amber side lights are on with the headlights.)

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!