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MAS replacement
In another thread I talked about how my Check Engine Electronics light came on several times. I took the advice offerred here to change my gas cap, and took it to Autozone to have the OBD2 code read. The code was P0100, and Autozone printed out the following for me : " The PCH has determined that a malfunction exist in the electrical circuit for the Mass air flow or volume air flow sensor. This code points to possible wiring problem, ie, short to ground, short to power, or an open circuit"
Do I need to replace the MAS? Is this a easy do-it-yourself job with no special tools or procedures to follow?
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RH 16 GLC300 12 C250 98 E300D 89 300SE 84 300SD sold |
#2
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Yes the air mass sensor is defective. Common fault, MB part number is 000-094-12-48 & list price is $ 240. OF course that is for your 1998 E300DT!
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
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Wow that was a quick response MBDoc. yes, that was for my 98 E300d. I just called one local MB dealer and they quoted $319 ! What is your source and is it oem?
Do I need to have special eqipment or follow special procedures to install? Thanks in advance
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RH 16 GLC300 12 C250 98 E300D 89 300SE 84 300SD sold |
#4
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Unless cash is no issue with you, I would strongly suggest checking the circuitry and functionality of the unit before buying a new one. Really easy to do with a volt meter.
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Inspector are you suggesting there's an easy way to test the MAS to make sure it is not working? How do I check using voltmeter, is there a post you can refer me to? Thanks
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RH 16 GLC300 12 C250 98 E300D 89 300SE 84 300SD sold |
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This is a silly question, but to be sure, I'm guessing that this is the 98?
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RH: Don't forget to patronize our sponsors when possible. They sure provide a valuable free service to us all.
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2008 GL320CDI 6K 1970 280SL 112K 1982 240D 210K (Sold) 1973 220D 220K (Sold) 1967 200D 160K (Sold) 1992 400E 139K (Sold) 1988 300E 148K (Sold) 1987 300D 257K (Sold) 1991 300E 108K (Sold) 1987 300E 131K (Sold) 1978 300D TMU (Sold) 1980 300D TMU (Sold) MBCA Member |
#8
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i can get one new for 200 dollars
hi i can get you a new one for 200 dollars
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#9
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CarolinaMBZ and Diesel1M : I am definitely buying from Fastlane.
Inspector : yes, for my 98 E300D.
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RH 16 GLC300 12 C250 98 E300D 89 300SE 84 300SD sold Last edited by richunters; 03-05-2003 at 04:49 PM. |
#10
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Well I got the part and installed the new MAS.
The MAS unit (122) is bolted onto the intake air filter cover on one end, and connects to the hose (127) going into the intake manifold on the other end. A simple job: Pull out the electrical connector. Loosen the screw on the o-ring clamp (133). Open the air filter cover so you can twist the cover/MAS unit away from the hose. Remove the 2 screws holding the MAS to the Air filter cover, then pull MAS off. Remove, clean, and re-insert the the rubber seal ring (114) on to the air filter cover. Screw on new MAS. Insert open end of MAS into hose. Replace and clamp down the Air Filter Cover. Tighten the o-ring clamp to secure the connection to the hose. Re-connect the electrical connector. A 10 minute job done in 20 minutes. Rather than waiting for the Check Engine light to reset (which probably takes a week) I drove to the local Autozone to have them Read and Erase the OBD2 code. The guy there knew only how to Read the code, so he thanked me for teaching him how to Erase. Heck, all I did was pointing out the Erase button on his tool! I hope the attached image makes it clear to newbies like me DIY for the first time.
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RH 16 GLC300 12 C250 98 E300D 89 300SE 84 300SD sold |
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I just wished the price and installation was the same for my car.
We have to buy the whole intake unit.
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified |
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