W212 rear heated screen

[SHAMGIT]

W212. 220cdi. blue tech 16 reg
Rear screen.
battery drain is down to faulty strips.
Got it well steamed up today
Put rear demister on
Lines started to clear screen working there way up and finished.
Top 5 lines on left of screen did not operate.
Top right and rest of screen was ok.
So what do i have to do to solve problem.
Can i pull fuse to stop battery drain and still drive
It looks to me like i have a choice of a new screen or some of that repair metalic paint stuff.
Has anyone had success with it.
Any help would be appreciated
Thanks in advance.

 

[SHAMGIT]

Pulled fuse but still got battery drain.. in 24 hours it has gone from 12.75v down to 12.05v.

I have turned everything off so it can go to sleep..

Any ideas. can i still drive car if i remove heated window relay.

 

[AMGeed]

You may get an error message if you remove the relay but you may still be able to drive the car. Nothing to lose by trying.
Needs a new rear screen really.

 

[SHAMGIT]

Forgot to mention
that i used my.. I casoft.. and came up with 2 codes

First is A3A813.. Window heating open circuit..

Second was.. 924E09..parctronic sensor number 3.malfunction

 

[SHAMGIT]

You may get an error message if you remove the relay but you may still be able to drive the car. Nothing to lose by trying.
Needs a new rear screen really.

Thanks mate will frighten myself to death looking at the price then i will contemplate giving it a heavy tap with an hammer and pay the excess

 

[SHAMGIT]

So still draining from12. 6ov down to 12.02v over night. So doesnt look like my rear screen is the problem. Have now replaced the fuse and relay. And the fuse for the front and rear bing bongs..
Car must not be going to sleep when locked.
Any ideas

 

[SHAMGIT]

Latest. When car is on tick over charge into bat is about 13.4v Started car. It had 12.4 drove i mile stopped for 10 mins at shop started car came home.
Did a code read ..0 faults... Ignition was on for code reader and Drivers door was open. It took about15 mins max then turned ignition off.
2 mins later tried to start car. Door still open. battery was dead. Checkrd voltage. It was 10.68v have left car door open and waited 20 mins battery has settled at 11.45v.
What i cant understand is.
The yellow engine warning light is permanently on and it has been since this battery drain problem started.
So has any one got any ideas other than star.