Well the fuel pressure regulator arrived and I installed it - no more leaking fuel! Unfortunately, when I went to start the car it still would not start. Would run for a second and cut right out, with the ETS message again.

I don't know what I was thinking, but just for kicks I unplugged the new MAF and the car started right up, ran smoothly for about 30 seconds, then cut out. Started it up, did the same thing. Plugged the MAF back in and it wouldn't run again. So I dug up the old MAF and plugged it back in and the car is running once again.

It looks like my MAF failed, and I will be seeking an exchange with the online seller. Looks like I'm stuck with sluggish performance until the replacement gets here. But at least the car is usable once again.

I'm eager to see if the new fuel pressure regulator clears up my long crank when hot.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280