Hi car don’t open with the key a few yards away had reconditioned PSR Pump fitted and someone said it’s the IR Radio receiver?

 

Welcome to MBworld!

Can you be more specific concerning the model and year of your car? Thanks!

Bob

 

Hi it’s a Sl500 2003 thanks

 

Welcome! Please post a photo of the SL.

 

moved to R230 forum...

 

Have you checked the battery inside the key? I believe it’s an R2032 battery, could be wrong.

 

Definitely had Machanic look at most things?

 

The battery os r2025, 2032 will not fit.
If the car opens only when you're close, its probably the battery. When you're close to the car, it opens via IR, that does not require battery at all.

 

I have no idea. I wasn't there...

The only infrared (IR) operation that does not require a battery is communication between the key and the ignition switch with the key inserted in the switch.

 

Thanks but every now and then the fob don’t correspond with the car even when I put the fob next to the door handle and have to use the key to get in

 

Be wary of any advice given to you by "someone".

The principal avenue of remove communication between the key fob and the locking system is by a radio frequency (RF) signal. There is, in parallel, an infrared (IR) signal which can lock/unlock the car and work the roof and windows.

It seems either the battery in your remote is weak, or the remote is faulty. So try another key and also check the batteries. If you look into the lens of the key and press the lock button you should see a brief pulse of light.