Does your 1993 have a similar DTC plug as my 1990 300E (same 3.0 engine). If so what codes are present? (This is the first place I look whenever I have an issue).

Next, I check the EHA to make sure it isn't leaking. While still in place, wipe it clean and place some talcum powder on it. Drive around for a few minutes and see if it's even slightly leaking. If it's not from the weep holes, then some new special EHA O-rings are needed.

Next, check the Crank Position Sensor. Unbolt it, clean it, re-install.

Next, remove and inspect the EZL for any even hairline defects, clean all the connections to it, re-install.

Next, get another OVP, then MAS (or fuel pump relay)

(BTW: the cruise control unit I got from you, still works like a champ- thanks)

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03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio