Hello All , i am 2002 ML500 owner . I have been spending around 12K for past 3yrs on its service and it has gone for 105600. I am kinda fed up on it , so i wanted to trade in .
Pl provide me some guidance.

1. Should i go for ML350 , i am worried about the service cost . So thinking to move to a Lexus
I dont want to spend 15-20K for next 5yrs

Moroever the Prestige Mercedez in Parmaus , NJ has a bad service center , i really dont like to go for their service

2. The Dealer was asking for a trade in value for 5500K as it has a milage of 105600 . But the online KBB and others give me a good value of 12k . I always had a good maintenance record .

Any suggestions will be helpful