Looking to sell my GL550. I've had this for about 6 months. I bought this with an issue with cam position. I replaced the cam position sensor and issues were resolved. I have driven it as a commuter since then and it has been a great vehicle. I also changed a few cracked coolant lines. It does intermittenty throw a code for boost below target but goes away on its own. Nice vehicle with plenty of power. Would like to sell to find something with better MPG. This is a previous Mercedes CPO car out of California. Thank you