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mike_a_mechanic, Mercedes Mechanic
Category: Mercedes
Satisfied Customers: 5471
Experience:  17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
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Hi, I have been told that I have a faulty block heater on my

Customer Question

Hi, I have been told that I have a faulty block heater on my Mercedes c200 2004. As I can't afford to get it replaced now the mechanic said I could just unplug it for now. I have the car up on ramps and the sump shield off. I have unplugged what I thought looked like it could be the heater plug but still I get quiet a large splash when touching the battery terminal to the battery. My question is have I unplugged the heater. It was a small black plug on a small black box on the under side of the sump. I think! Any ideas?
Submitted: 4 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 4 years ago.


I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.

I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.

Thank you,


Expert:  mike_a_mechanic replied 4 years ago.

Hello, welcome. My name is Mike, I will do my very best to
assist you with your question.

From what you are describing you have unplugged the correct harness and have disconnected the block heater.