1998 S320 Keyless not working after replacing central lock
I recently had to replace the central lock for my 1998 S320 W140.
Problem is, keyless (remote) is not working anymore. It was working before the central lock broke down and needed replacement. The electrician said I needed to order new keys which are extremely expensive

I tried to program the remote again, but no luck.
Here's my question, if the remote used to work before. Now that I have changed the central lock, why wouldn't it work ? I don't get it. He didn't touch anything else from what he told me, just the central lock.
I feel like he's just telling me to order a new key coz he thinks I'm rich, and I'm not.
Appreciate any advice



