2005 Mercedes C-Class Owner's Manual - Page 222

Controls in detail Audio system Switching between calls Press s button. This switches between the calls. The non-active call is kept on hold. Terminating a call Press t button. The current call is terminated. The connection to the caller previously kept on hold is also interrupted; however, reconnection is indicated by an acoustic signal. Placing a second call If you wish to place another call during an already active call, you can place the second call and switch between the callers or combine them into one call. Note that this feature is depending on availability from your mobile phone service provider. Placing a second call Place a new call by entering telephone number manually. Press s button. You are connected to the second caller; the first caller is kept on hold. Terminating a call Press t button. The current call is terminated. The connection to the caller previously kept on hold is also interrupted; however, reconnection is indicated by an acoustic signal. Combining two calls Press s button. The calls are combined into one call. Terminating a combined call Press t button. The connection to both callers is terminated. 220