MBenz W169 battery drain !!

[Xhemal]

Hi guys , So something is draining my battery ( battery is almost new ) , I haven't check anything with multimeter. I need to drive the car every day so it will start the next day. Any idea who has or had this car in case faced a battery drain what could be the common problem ?

 

[mattkh]

Hi guys , So something is draining my battery ( battery is almost new ) , I haven't check anything with multimeter. I need to drive the car every day so it will start the next day. Any idea who has or had this car in case faced a battery drain what could be the common problem ?

Take the pollen filter out and look inside for water.

 

[Xhemal]

Take the pollen filter out and look inside for water.

There is no water now, because i have cleaned the draining hole before ( it was fully blocked i belive ) , what could be damaged from that water ?

 

[mattkh]

There is no water now, because i have cleaned the draining hole before ( it was fully blocked i belive ) , what could be damaged from that water ?

Did that water go down towards the floor. If it did, then check any electronic gadgets down there for dampness/rust in the plugs.

 

[Xhemal]

Did that water go down towards the floor. If it did, then check any electronic gadgets down there for dampness/rust in the plugs.

Well, i found somewhere here that phone module usually gets damaged from this case, but i dont know the location of this module . But it seems that i might neee the remove the seats too

 

[V6Matty]

Don’t forget the battery and main fuse box is in the foot well on the drivers side, I managed to fill mine with water when the drains got blocked, worth checking there to see if something got wet

 

[Alfie]

Well, i found somewhere here that phone module usually gets damaged from this case, but i dont know the location of this module . But it seems that i might neee the remove the seats too

Look under the carpet under the passenger seat. Ill bet its soaking wet.

 

[Xhemal]

Look under the carpet under the passenger seat. Ill bet its soaking wet.

I have open the water pipes before, water must be gone now , unles that phone module is draining my battery , do i need to take off the seat to check that ?

 

[Xhemal]

Look under the carpet under the passenger seat. Ill bet its soaking wet.

just to confirm , im not in UK, so my passenger seat is the right side of me ?! Is that the place i need to look ?
I tried removed fuses 46,47 related to Telephone systems, but that seems to do nothing .
I even don't have the tools to remove the seat

 

[mattkh]

You know the fan heater in the car.
Does it work on positions 1,2,3,4 i.e. from slow to full fast..?

 

[Xhemal]

You know the fan heater in the car.
Does it work on positions 1,2,3,4 i.e. from slow to full fast..?

AC works on all positions ,

Just removed some fuses, which i think are usless :
2 - heated Rear window (Never use this, or not sure even if it works )
46,47 - Telephone systems - not got use it
16 - Parkotronic system , - Well i dont know why this fuse is there, my car dont have this feature
- Glove Box light - the light inside glove box never worked , or not sure if it even exist

 

[mattkh]

just to confirm , im not in UK,

Aha.....So the pollen filter is on the drivers side, yes.

 

[Xhemal]

Look under the carpet under the passenger seat. Ill bet its soaking wet.

Well after removing fuse 47 related to Telephone Systems ( SE) , current dropee from 0.75 A to 0.15 A !

How much does this car take current when turned off ? ( Key removed )

 

[mattkh]

Well done. Problem solved.

 

[Xhemal]

Well done. Problem solved.

Yes, is 0.15 A , normal current drain ?

 

[mattkh]

Here we go.
150 milliamps will go down when you close the door, lights are off, and the car computer goes to sleep.
With this small current drain, your battery should not let you down for at least a week if the car is not used.