When you actually take the fuse out you will find it has cracked and is bad, even though it looked fine.

Replace all of them, the rest are in the same condtion after 15+ years.

Happened to me a couple weeks ago, quite a scare looking down and seeing NO oil pressure! I'd pulled over and checked the oil and run the engine looking at the valve train to check for oil delivery before I remembered the W124 has an electric guage....

Note that on the W124 you will also have no brake lights! May or may not be true of the W201 chassis, but something to check.....

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!