My 1994 E320 mercedes check engine light is on , but no diagnostics available, what now?

Asked by TN1994 Oct 16, 2013 at 05:16 PM about the 1994 Mercedes-Benz E-Class E 320 Sedan

Question type: Maintenance & Repair

My guys say they cannot "trace" the 16 codes they received. The car shakes and shudders like it is misfiring at stops and is sluggish at times. Then, suddenly it is smooth? The codes are not telling my mechanics what to fix, so I am in tight spot. What now?

3 Answers

6,675

First things first, check the ovp relay. It's on the bulkhead under the bonnet, square silver can, clear plastic lid wiv a fuse in the top. If that's ok there's a little black box just behind the headlight wiv 2 round plugs which fail often. Could also be simply a fuel pump broken down. When you turn the key to auxiliary do you hear the pump hiss? Fuel head could be on its way out, that's the silver thing on top of the inlet manifold with all the pipes coming out of it. Also check your spark plug leads, they tend to split and when that happens they lose power which causes the plug to produce a weak spark. Check the dizzy cap for cracks, they notoriously brittle. The bit under the fuel head, the bit that's half metal half rubber, has a couple of air hoses going to the underneath of it, check these are still attatched and don't have any splits. Good luck.

2 people found this helpful.
2,375

The average corner garage's code reader will only read OBD codes which are for emissions related faults. You'll have to go to an MB shop to get proper diagnoses. Sounds like, however, you have a "tired" MAF sensor which will cause thoses exact symptoms.

2 people found this helpful.
6,675

before you take it to the stealers, if you have the codes picked up on the machine, take a look here: http://www.obd-codes.com/trouble_codes/

2 people found this helpful.

Your Answer:

E-Class

Looking for a Used E-Class in your area?

CarGurus has 496 nationwide E-Class listings starting at $5,700.

Postal Code:

CarGurus Experts

  • #1
    Soranbook
    Reputation
    3,050
  • #2
    dandyoun
    Reputation
    2,990
  • #3
    bobkat
    Reputation
    2,980
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Mercedes-Benz C-Class
98 Great Deals out of 1,455 listings starting at $3,799
Used Mercedes-Benz S-Class
15 Great Deals out of 227 listings starting at $8,977
Used BMW 5 Series
19 Great Deals out of 321 listings starting at $4,500
Used BMW 3 Series
71 Great Deals out of 1,176 listings starting at $1,995
Used BMW M5
56 listings starting at $26,800
Used BMW M3
8 Great Deals out of 90 listings starting at $15,995
Used BMW 7 Series
9 Great Deals out of 119 listings starting at $5,995
Used Mercedes-Benz G-Class
10 Great Deals out of 166 listings starting at $34,800
Used Chevrolet Corvette
29 Great Deals out of 1,060 listings starting at $15,871
Used Porsche 911
12 Great Deals out of 322 listings starting at $21,888

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. Content will be removed if CarGurus becomes aware that it violates our policies.