I'm having a strange issue where my 98 e320 after idling an 1-2 hrs (cut that time in half every time if I have the interior or exterior lights on or I'm blasting my aftermarket stereo sound system) it begins to shake, idling roughly. Most cases I can turn the car off then back on and it's fine. With the case of the stereo and lights, it will idle rough then pretty quickly the engine will shut. After that it will start up but then almost immediately die or it will start up but will be idling a little rougher than before. The only way to get it out of what seems to be a 'mode' to me, is to drive it about a block, shut off the car and restart it, then everything is fine again. Both the alternator and battery are fine according to testing, and none of this happens while driving the vehicle with all lights on and system up to the max. Any possible clue to what may be causing this issue would be greatly appreciated.

Asked by Jan 16, 2016 at 09:59 PM about the 1998 Mercedes-Benz E-Class E 320

Question type: Maintenance & Repair

3 Answers

77,765

Sounds like your idle is having a problem keeping up with the load on the alternator. Probably need to give the throttle body a good cleaning, run a scan on it to make sure all the sensors are working, have a clean air filter, and check for vacuum leaks. The idle is set by the computer, the engine probably needs a little maintenance.

1 of 1 people found this helpful.

Thank you very much...that sounds about right. I bought the car used and the only maintenance that's been done on it is the A and B that's done at the dealership

YOUR NEW RADIO IS DRAWING MORE POWER THAN THE CAR CAN PRODUCE. TO RUN THE RADIO AND EVERYTHING ELSE THAT IT NEEDS TO. YOU NEED A BIGGER ENGINE OR YOU NEED TO REDUCE THE POWER CONSUMPTION. YOUR RUNNING A POWER DEFICIT AND THE ENGINE WILL SIMPLY SHUT DOWN.

Your Answer

E-Class

Looking for a Used E-Class in your area?

CarGurus has 22,053 nationwide E-Class listings starting at $1,800.

ZIP:

Mercedes-Benz E-Class Experts

  • #1
    Tom Demyan
    Reputation
    2,330
  • #2
    dandyoun
    Reputation
    2,050
  • #3
    bobkat
    Reputation
    1,530
View All

Related Models For Sale

Used Mercedes-Benz C-Class
838 Great Deals out of 25,909 listings starting at $1,500
Used Mercedes-Benz S-Class
124 Great Deals out of 7,630 listings starting at $1,200
Used BMW 5 Series
459 Great Deals out of 16,101 listings starting at $1,032
Used BMW 3 Series
1,103 Great Deals out of 32,999 listings starting at $1,200
Used Mercedes-Benz M-Class
275 Great Deals out of 6,241 listings starting at $1,995
Used BMW 7 Series
117 Great Deals out of 5,062 listings starting at $1,770
Used Mercedes-Benz SL-Class
42 Great Deals out of 3,376 listings starting at $4,500
Used Audi A6
149 Great Deals out of 7,123 listings starting at $2,050
Used Mercedes-Benz CL-Class
23 Great Deals out of 504 listings starting at $4,580
Used Mercedes-Benz G-Class
3 Great Deals out of 987 listings starting at $25,000
Used Mercedes-Benz CLK-Class
36 Great Deals out of 1,104 listings starting at $2,995

Used Cars For Sale

2018 Mercedes-Benz E-Class For Sale
7 Great Deals out of 7,617 listings starting at $49,995
2017 Mercedes-Benz E-Class For Sale
63 Great Deals out of 2,239 listings starting at $37,917
2016 Mercedes-Benz E-Class For Sale
15 Great Deals out of 939 listings starting at $24,895
2015 Mercedes-Benz E-Class For Sale
107 Great Deals out of 1,928 listings starting at $19,995
2014 Mercedes-Benz E-Class For Sale
169 Great Deals out of 2,560 listings starting at $17,981

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.