The harmon/becker amp in my 2007 C 280 drains power from battery after car is turned off, but it works well otherwise...fix or exchange, where and how please?

Asked by Jan 05, 2013 at 11:48 AM about the 2007 Mercedes-Benz C-Class C 280 4MATIC Luxury AWD

Question type: Maintenance & Repair

harmon/becker amp drains battery after car is shut down

4 Answers

7,325

The factory amp in my 89 Lincoln did the same thing. It was frustrating to find the problem. I am guessing that there is a dirty/wet electrical connection that is creating a circuit when the car is off. That is exactly what happened to mine. I would clean all electrical connections going to the amp with electronics cleaner spray.

2 people found this helpful.

Thanks but we have removed the amp and all is well. With the amp installed it drains...? Maybe a stero shop can bench test the amp???

7,325

Yes maybe you can but I would try to clean all the connections first and then hook the amp back up. Is the amp on an independent relay? Make sure its not stuck. Have you checked the connections with a multimeter while the car is turned off?

2 people found this helpful.

It is the amp-is does not "go to sleep" when the car is turned off.

Your Answer:

C-Class

Looking for a Used C-Class in your area?

CarGurus has 26,562 nationwide C-Class listings starting at $1,750.

ZIP:

Mercedes-Benz C-Class Experts

  • #1
    Lorne Grandison
    Reputation
    5,610
  • #2
    PPC123
    Reputation
    3,960
  • #3
    zabi
    Reputation
    2,990
View All

Related Models For Sale

Used Mercedes-Benz E-Class
419 Great Deals out of 19,824 listings starting at $1,995
Used BMW 3 Series
898 Great Deals out of 31,547 listings starting at $900
Used Mercedes-Benz S-Class
159 Great Deals out of 7,014 listings starting at $3,495
Used Mercedes-Benz CLS-Class
79 Great Deals out of 2,132 listings starting at $6,000
Used BMW 5 Series
408 Great Deals out of 16,862 listings starting at $1,653
Used Audi A4
227 Great Deals out of 10,804 listings starting at $1,000
Used BMW M3
19 Great Deals out of 1,518 listings starting at $7,900
Used Ford Mustang
256 Great Deals out of 38,497 listings starting at $1,350
Used Mercedes-Benz CL-Class
23 Great Deals out of 492 listings starting at $4,498
Used Mercedes-Benz M-Class
233 Great Deals out of 5,603 listings starting at $1,900
Used Dodge Charger
294 Great Deals out of 32,237 listings starting at $1,850
Used Honda Accord
582 Great Deals out of 104,443 listings starting at $1,225

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
81 Great Deals out of 1,666 listings starting at $22,399
2016 Mercedes-Benz C-Class For Sale
23 Great Deals out of 818 listings starting at $19,500
2015 Mercedes-Benz C-Class For Sale
226 Great Deals out of 4,794 listings starting at $15,900
2014 Mercedes-Benz C-Class For Sale
67 Great Deals out of 1,330 listings starting at $12,000

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.