I have a 1997 C230 that cranks but will not start after sitting for 7 days. This happened once before, did not start for 3 days on the 3rd day she started, I took her to the shop. They did not find any error codes nordid she fail (they tried for 5 days). Never had a problem during warm weather. We do nothave amercedes dealer so I someowhat on my own.

Any suggestions- fuel pump, crank position sensor, MAF.

Thanks

JR