How to check if the seat mat is 3-wired in Mercedes A W176, B W246, C W204, ML W166 and some others?

The seat occupancy sensor in most new Mercedes models may have 2, 3 or 4 wires:

  • white, red, brown (3-wired mat)
  • blue, brown, black (3-wired mat)
  • black, black (2-wired mat)
  • white, red, brown, green (4-wired mat in some models with WSS system, although wires colors may be different in case of the 4-wired seat mat)
Below there are photos of the versions. The photos were taken under passenger side seat.

3-wired seat occupancy sensor
- brown, blue, black:

3-wired seat occupancy sensor
- red, white, brown:

2-wired seat occupancy sensor - black, black:

4-wired seat occupancy sensor - GLA USA

4 Replies to “How to check if the seat mat is 3-wired in Mercedes A W176, B W246, C W204, ML W166 and some others?”

  1. Pretty section of content. I simply stumbled upon your website and in accession capital to say that I get actually loved account your weblog posts. Any way I抣l be subscribing for your augment or even I success you get admission to constantly fast.

  2. hi!,I like your writing very much! share we communicate more about your post on AOL? I need a specialist on this area to solve my problem. May be that’s you! Looking forward to see you.

Leave a Reply

Your email address will not be published. Required fields are marked *