It's a whites knob that unscrews...then you pump. I saw bergsma pump on one of his old w123 and it was a black button almost.. Thanks. She ran fine all day today with a full tank o fuel

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Current stable......
17' Rogue SV 70k
11’ Saab 9-5 NG 94k
10’ e550 4matic 185k

sold
02' e320 210k
00' e430 167k
01' e320 171k (regret sale)
91' 300d 2.5t 300k (sold to ecoofidaho)
79' 240d 177k (old yellow my avatar)
87' 300d 169k (junk but fast)
85' 300tdt 261k (RBM parts delivery)
85' 300dt 68k (one owner cream puff)
82' 240d 250k
84' 300dt 198k (sold to diesel don)
91' 190e 2.3 61k
88' 260e 140k