Amberjae

Hello Benz World,
I own a 2006 C280, A few months ago I tinted my window and i think this is where my problem started. (Not a 100 % sure it may just be a coincidence) I read a few of the forums stating that the tint may be the issue so i removed the tint (more $$ down the drain) yet that did not help My key only unlocks / locks from the IF on the driver side door. Funny thing is even on the door it takes awhile to open i have changed the batteries on the keys . that did not help... funny thing is it seem to work faster at night when the place is cool ( i live in south florida). I dont know what else to do i was just thinking of doing a after market alarm.. Please advise..

Amberjae

sammydragon3

could be your key

or the sensor on the door

about the tints that's bull****. I have 20% black tint on my car and its fine. I can unlock my car down the block.

after market alarm is a bad thing to do. your car has an alarm already

Glyn M Ruck

Ignore this post ~ it is wrong.

If your key will open via the IR in the door handle but not at greater range then your RF is down.

This can be caused by.

~ Metallic tints
~ Cut wires by the tinting people where the antenna wires come out of the rear screen
~ Sticky pad dislodged by tinting people at the centre top of the rear screen
~ Antenna amplifier blown by water from applying the tint
~ Bad earth on the antenna amplifier
~ Flat battery in key or sender antenna in key desoldered from the board.

Is the AM reception on your radio bad? It shares the same antenna

Good luck!