My 87 190D 2.5 is the OM602 and I'm pretty sure it doesn't have afterglow. It's probably just the W124 that had it, and maybe not even all of them had it.

__________________
Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.