S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

New owner of "94" S420...first problem...

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Old 01-28-2013, 10:49 AM
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1994 S420
New owner of "94" S420...first problem...

OK. I got the car. It had sat for about 6 months. I did both cap and rotors and plugs(ALL BOSCH) car ran great. I started it up. It sounded like it was going to stall but then it kicked up then the engine light came on. I thought it was old fuel. I used dry gas and nothing. I ran it down the highway for a few hours with injector cleaner. Nothing. A freind of mine said it sounded like a TPS. I think this year doesnt have this. My guess it was a mass air flow problem or sensor. When I get to about 1000rpm to about 1600rpm it stutters back and forth. After it pass 1600 it runs great. I am thinking about just spending the $250 on the mass air flow unit and hope it works. does this sound like a fix?
Old 01-29-2013, 01:09 PM
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MERCEDES BENZ SE 300
use MB fluids ,,,,,,,,,,,,,,,,,,,,,,,,,

M

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