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

6,585

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 of 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???

6,585

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 of 2 people found this helpful.

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

Your Answer

Add photo

Related Questions

C-Class

Looking for a Used C-Class in your area?

CarGurus has 26,581 nationwide C-Class listings starting at $2,000.

ZIP:

Search Mercedes-Benz C-Class Questions

Mercedes-Benz C-Class Experts

#1 Lorne Grandison
Lorne Grandison
Reputation 4,780
#2 PPC123
PPC123
Reputation 3,320
#3 dandyoun
dandyoun
Reputation 2,420
View All

Related Models For Sale

Used Mercedes-Benz E-Class
418 Great Deals out of 19,904 listings starting at $699
Used BMW 3 Series
973 Great Deals out of 31,729 listings starting at $1,000
Used Mercedes-Benz S-Class
171 Great Deals out of 6,479 listings starting at $2,700
Used BMW 5 Series
460 Great Deals out of 15,985 listings starting at $1,700
Used Mercedes-Benz CLS-Class
47 Great Deals out of 2,247 listings starting at $6,456
Used Audi A4
227 Great Deals out of 10,877 listings starting at $1,899
Used BMW M3
45 Great Deals out of 1,517 listings starting at $5,800
Used Mercedes-Benz CL-Class
21 Great Deals out of 584 listings starting at $4,495
Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Mercedes-Benz M-Class
175 Great Deals out of 5,171 listings starting at $1,990
Used Honda Accord
813 Great Deals out of 84,287 listings starting at $1,050
Used Mercedes-Benz CLK-Class
38 Great Deals out of 1,258 listings starting at $1,500
Used Dodge Charger
407 Great Deals out of 28,172 listings starting at $1,988

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
22 Great Deals out of 13,122 listings starting at $31,950
2016 Mercedes-Benz C-Class For Sale
61 Great Deals out of 1,957 listings starting at $24,755
2015 Mercedes-Benz C-Class For Sale
45 Great Deals out of 1,286 listings starting at $20,915
2014 Mercedes-Benz C-Class For Sale
64 Great Deals out of 2,358 listings starting at $13,980
2013 Mercedes-Benz C-Class For Sale
55 Great Deals out of 1,738 listings starting at $12,190

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.