Hi, I recently acquired a 2001 E320 4matic wagon and am in the process of working out a list of minor issues.
I'm down to the faulty passenger seat sensor that causes the SRS light to stay on and one other annoying issue:
Whenever I shift in Reverse and stay in that for longer than 1 second, the car beeps and displays a lamp warning. Should be easy right? But both reverse lights are bright and fine! I've checked myself with someone else operating the car for no less than 10 times!
Any suggestions? Are some other lights suppose to come on when in reverse? Thanks.
Please take a moment to click user cp and edit details so you can easily add your vehicle and location to your profile, it's often useful information when you're seeking assistance.
The first thing to do, since you are not the original owner, is to INSPECT the bulbs. They have to be the proper bulb, and many of the aftermarket (and most of the LED crap) won't work properly. The easiest thing to do is simply pick up a pair of them at the dealer, that way you know they are correct.
Once you have double-confirmed that the bulbs are correct, then the next step is to focus on the lamp holders and the connections on the PCB. It's all covered in the stickies.
BTW, Gurmail, I keep meaning to tell you that I love your profile pic. Did you take that yourself, and if so, do you mind posting the full-size one, perhaps in a gallery? It's a brilliant shot.
Since it does only happen when going into reverse, you should check both bulbs for the reverse lamps and make sure they are both the same brand and wattage. Any discrepancy and it will make the lamp warning come on.
The warning works -to my knowledge- by sending a measuring the current through the lighting system -in this case the reverse- .
if the socket is corroded or as the expert above said wrong bulbs, error message will appear.
check the sockets and bulbs for corrosion. small dirt particle wont stop the light from turning on but enough for a warning message.
ours had the same issues but fixed them by sanding the sockets and the bulbs
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