Tom in Austin

Odd thing, the ability to lock/unlock my doors by touching the door handle (e.g. "Keyless Go") is declining ... used to be you barely touched the handle and it immediately locked (or unlocked) ... now it's so unresponsive I've quit using the feature and just press the button on the key to be sure the car is locked. All four doors are affected the same way.

Only thing I can think of is the batteries in the keys are now 4.5 years old ... do they wear out in this timeframe and is this what happens when they get old?

tommiett

I had to change my batteries after 2 years of use. Cheap way to check if this is the issue.

Tom in Austin

Yes, thanks. One key works perfectly now with a new battery, the other has same symptoms ... buttons on the key work, but no response from touching the door handles.

BTW, the key remote on my 2006 Honda still works like new on the original battery. Same for my wife's 2011. We had a couple Lexus with remote keys over the years, so this is a small sample but still the first time I've ever had a remote key stop working due to a battery expiring.

ChazThePhoenix

the MB remote does more than just unlock. it has a radio proximity frequency so it knows your close...broadcasting all the time...

tommiett

The MB's keyfob seems to like batteries... Changed my twice already in one remote. My 5-year-old Toyota truck has the original. Not a big deal... Guess its just part of owning an MB.

Tom in Austin

Thanks all, interesting lesson about our cars ... good thing I can get a ten-pack of those CR2025s on Amazon for $4 ...