Kenneth_kwok

Good day.

*** BATTERY ****
I bought my used 2005 E500 W211 in August 2013.
I don't know when/whether the battery was changed.

After purchase, the battery has been mostly fine.
Probably twice in Hong Kong winter (> 5 degree Celsius)
it says "convenience features switched off ?to save battery"

*** Sensonic Brake Control ***
My friend's ?2003 W211 Sensonic brake failed in public holiday. Luckily, he said he has a few minutes' warning to stop the car,
before the car is locked for towage.
So, I am always afraid of the sensonic brakes
When I bought the 2005 car, it has the facelift horizontal stripe
LED external turn indicator/headlight.
So, I thought it's facelift, without the sensonic brakes. The second
hand dealer told me it's a facelift.
He lied. It is not facelift, and still have the sensonic brake

Is it stupid to replace it, if it ain't broke.
Or is it NOT stupid? I don't want to die from brake failure.

Question:
1 Do I routinely change the car battery? Both batteries?
2 Or, do I wait till there are more "low voltage" warning, and
then change?
3 Are there many owners who have the sensonic brakes working
well?
4 Are most sensonic brakes "ultimately" going to fail? Any average life span?
From your estimate, what percentage of sensonic brakes need replacement?
5 Would you "prophylactically/preventively" replace the brakes system?

Oh... I am not talking about brake pads.

I think I probably wouldn't replace the brakes system.
As I don't know if the new brakes may
bring problems, while the old ones would work.
Different to replacing batteries. I would think new batteries would just work, and extend the lifespan)


Many thanks for your expert opinion.

despicable merc

Maybe it was replaced already. Check car report.. If it's 2005 you can replace it by the warranty. Go to the dealer and talk to them.. SBC comes with 10 Year warranty.