Need answers..94 mercedes c280 issues

Asked by Aug 30, 2012 at 06:11 PM about the 1994 Mercedes-Benz C-Class C 280 Sedan

Question type: Maintenance & Repair

when car is in drive and stopped, engine seems to "buck", occassional black smoke especially on startup, excessive fuel consumption. Fuel in oil? Replaced EGR and Fuel regulator...doesnt seem to have helped much. Any ideas? At a loss.

4 Answers

27,525

Could be a bad ( mass airflow sensor ) my old c280 had a similar issue and I was able to clean the sensor with ( CRC mass airflow senor cleaner ) and it solved my problem. However it does require a special tool to remove, I just used a dremel tool and turn the bolts into flat head screws wich worked great. There are several good mercedes forums that have great info on this as well.

3,065

you need to check wich injection system does it have. if it is the cis system it has a plate to measure the air mass this needs to be serviced (cleaned) check that your maintenance is up to date ( spark plugs, cables, ignition parts, etc). please post more information if you need more help.

5,505

When was the last time the car was properly tuned and maintained. Black smoke indicates that it is running rich ( too much fuel, not enough air), the fact that you are experiencing high fuel consumption confirms this. Check all the systems that would contribute to an engine running rich. (worn spark plugs, dirty fuel injectors, old plug wires, defective ignition coils, faulty o2 sensor)

21,525

fuel in the oil often indicates an injector leaking. Will make the car run real rich too

1 people found this helpful.

Your Answer

C-Class

Looking for a Used C-Class in your area?

CarGurus has 25,818 nationwide C-Class listings starting at $1,488.

ZIP:

Mercedes-Benz C-Class Experts

  • #1
    Lorne Grandison
    Reputation
    5,420
  • #2
    PPC123
    Reputation
    3,900
  • #3
    zabi
    Reputation
    2,880
View All

Related Models For Sale

Used Mercedes-Benz E-Class
396 Great Deals out of 19,984 listings starting at $1,850
Used BMW 3 Series
833 Great Deals out of 32,432 listings starting at $995
Used Mercedes-Benz S-Class
106 Great Deals out of 7,167 listings starting at $2,000
Used BMW 5 Series
395 Great Deals out of 16,361 listings starting at $900
Used BMW M3
12 Great Deals out of 1,668 listings starting at $6,995
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Chevrolet Camaro
224 Great Deals out of 28,922 listings starting at $3,900
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
98 Great Deals out of 2,001 listings starting at $23,900
2016 Mercedes-Benz C-Class For Sale
12 Great Deals out of 860 listings starting at $20,900
2015 Mercedes-Benz C-Class For Sale
216 Great Deals out of 4,438 listings starting at $16,591
2014 Mercedes-Benz C-Class For Sale
67 Great Deals out of 1,504 listings starting at $11,518
2013 Mercedes-Benz C-Class For Sale
64 Great Deals out of 1,277 listings starting at $9,850

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.