Pre safe sensor fail?
Thread Starter
Newbie
Joined: Dec 2015
Posts: 3
Likes: 0
r class 320cdi L
Pre safe sensor fail?
Hi all. First time poster.
I have a 2007 R class 320. Had a few years now and its starting to have a few issues. The main issue came this last weekend.
When driving, the seat belt suddenly kept tightening for no reason. It really did pull real hard. I tried unbuckling and locking it back in, but every 20-30 seconds it would tighten. You can hear the whine of the motor pulling it tight. Its totally un-driveable.
It turns out all the belts are doing this, the back as well as far as I can tell. Plus the windows go up if they are down.
As best as I can tell, the pre-safe keeps getting activated. The car thinks I am about to crash.
Its off to the local merc place tomorrow, but its Christmas and I dont think I will see it again till the new year as I imagine its a faulty sensor and they will need to order the parts.
My question is does anyone know how to switch off pre safe while I await the part so I can drive the car over Christmas. I need it as got to chug family here and there over the holidays?
Secondly, does anyone have any idea what the issue may be? I am guessing its a fault with pre safe, but no idea really. The garage had never heard of this and neither had my local Merc dealer tech guy?
Thanks for your time guys.
I have a 2007 R class 320. Had a few years now and its starting to have a few issues. The main issue came this last weekend.
When driving, the seat belt suddenly kept tightening for no reason. It really did pull real hard. I tried unbuckling and locking it back in, but every 20-30 seconds it would tighten. You can hear the whine of the motor pulling it tight. Its totally un-driveable.
It turns out all the belts are doing this, the back as well as far as I can tell. Plus the windows go up if they are down.
As best as I can tell, the pre-safe keeps getting activated. The car thinks I am about to crash.
Its off to the local merc place tomorrow, but its Christmas and I dont think I will see it again till the new year as I imagine its a faulty sensor and they will need to order the parts.
My question is does anyone know how to switch off pre safe while I await the part so I can drive the car over Christmas. I need it as got to chug family here and there over the holidays?
Secondly, does anyone have any idea what the issue may be? I am guessing its a fault with pre safe, but no idea really. The garage had never heard of this and neither had my local Merc dealer tech guy?
Thanks for your time guys.
MBWorld Fanatic!
Joined: Jun 2006
Posts: 1,140
Likes: 118
From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
You're user manual will show the location of the fuse boxes - probably 3 of them in total. There should also be a map of the fuses inside the fuse boxes.
