What it means perf serv on time the display Mercedes e320?

"Perf Serv on Time" on the display of a Mercedes-Benz E320 indicates that the vehicle's performance service is due or has been performed on schedule. This service is part of the vehicle's regular maintenance and is typically performed every 10,000 miles or 1 year, whichever comes first.

The performance service typically includes the following checks and maintenance tasks:

- Oil change

- Oil filter replacement

- Air filter replacement

- Fuel filter replacement

- Spark plug replacement (if needed)

- Transmission fluid change

- Brake fluid flush

- Coolant flush

- Inspection of various components, such as the brakes, tires, steering, and suspension

By performing the performance service on time, you can help keep your Mercedes-Benz E320 in good condition and prevent costly repairs down the road.