AMG_Adon

So my primary key fob wont turn over... it unlocks and locks my car but when i put it in the key receiver it does not turn... my spare key turns the car on just fine... anyone experienced this problem? what can be the cause of this ?

Rudeney

First, i would check the vehicle battery. That may not be the culprit, but a weak battery can cause all sorts of electrical gremlins, including "killing" a key. For example, leaving the key in the ignition and then the battery dying can ruin that key. There is really no way to re-sync a key - once it gets locked out, it's toast.

AMG_Adon

what level should the battery voltage maintain? and i think thats what happened i left the key in the ignition while i was putting on my spare tire because i had a flat ... i took the key out after i get the spare on and few mins later tried to ignite the car and it locked out and the key led fob blinks

Rudeney

Battery should show 12.6v at rest, no less than 11v during cranking as the starter runs, then around 14.2v with the engine running.

AMG_Adon

thanks appreciate it any really good battery u recommend? i think my amp is causing the drainage possibly and one more thing im sure this is not battery related but i got a SRS code today and now the passenger seatbelt does not pop out when the door closes thats odd first time i ever got a SRS code

Rudeney

I like the MBZ batteries. I think are made by Varta.

AMG_Adon

OoO ok thanks again... I have a question another question for you my car says restraint system malfunction and has the SRS code ... And my passenger seat mechanism doesn't come out anymore any way to quick fix that witout the dealer ?

Rudeney

Nope. Most all SRS errors are "persistent" and can't be cleared until the underlying fault is corrected, and then the error is reset via SDS (or other high-end scan tool - not generic OBDII).