Getting Started with service for a 2008 GL320
Jim
Sounds like you're into Mercedes..so what's you're experience..less trouble than average with superioir longevity (assuming proper maintenance)? Do all the component electronics hold up better than average? I have 365,000 miles on my Lexus sedan, and never a major issue, including electronics. I'm a little paranoid that the Germans are a money pit in disguise..but the drive is superior. Hope the peripherals are commensurate.
Regarding electronics, my Comand unit did fail on my GL. It required a replacement to the tune of about $2700, covered under my extended warranty.
My opinion is that Mercedes GL is you don't really have to worry about the drivetrain. Outside of the drivetrian they do have a lot of sophistication which brings a lot more things to fail. I would guess it will have more issues than your Lexus.
Anyway, still waiting for anyone's recommendation on best DIY manuals and/or DVD's.
OBD readers WILL read the US required OBD parameters BUT, you won't be able to do anything about them. Clearing them will simply mean they reset. One of the best values around for technical stuff is https://epc.startekinfo.com/epc/home.jsp it is subscription based. You do get accurate info though. There are some expensive computer systems available the allow access to the electronics but I haven't 'sprung' for one yet.
Example of electronic issues - our satellite radio (that my wife likes) just now refuses to find the sat signal. Rather than pay the dealer over $100 just to diagnose the problem and then who knows how much replace the antenna (if that is the problem) I plan on going to Car Toys and find out just what they offer in the way of Sat radios and if there are any I can plug one in to the aux input of the audio system. Even if I have to replace the entire head unit at least I'll have a decent nav system rather than the clutzy COMAND unit that can't even be updated properly!
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I have NEVER had mine give my correct location when I get home (it gives the wrong side of the street and is at least a half mile off). There is no way for me to tell it "this is home" and what the address is, when I'm parked in the driveway.
And, if the battery is drained - for any reason - ALL previously remembered destinations are gone. If you didn't write down all the particulars, you have to start from scratch again.
Interested in the altitude when traveling over mountain passes? Forget using the altimeter on the GPS. It is a minimum of 200 ft off, usually 600-800ft in error. I checked with the dealer and they did a lot of work before they determined that there is no standard for accuracy of the altimeter. No programming is available to fix the issue.
Yes, the nav disks are available but each update costs more that three Garmin, Magellan or Tom-Tom GPS units.
Like I said, if something, anything, goes wrong, I won't hesitate to replace the entire head unit with whatever is the best deal available.
Last edited by Fourdiesel; Sep 29, 2012 at 06:34 PM.
Mercedes refused to exchange my radio during warranty, blaming Sirius/XM for the problem. Since they merge, the signals are mixed up ??.
However, I got a Sirius/XM radio at RADIO SHACK and tune my radio to un-used station and now works without interruptions, amazing a $59.00 dollar radio works better than a $2300,00 Mercedes radio.
Now, my car is out of warranty, and I wanted to purchase a SERVICE MANUAL, come to find out, now, the manuals are a subscription from Mercedes and cost up to $3100.00 dollars per year to subscribe.
NOt only we paid $91,000.00 for the car new, now Mercedes is trying to squeeze more from their customers.
SHAME ON MERCEDES BENZ.
I have had Mercedes for the past 40 years, never had a problem till now.
Thinking of doing some research on other brands and get rid of out two Mercedes.
However, the car have been running mechanically good so far.

Mercedes refused to exchange my radio during warranty, blaming Sirius/XM for the problem. Since they merge, the signals are mixed up ??.
However, I got a Sirius/XM radio at RADIO SHACK and tune my radio to un-used station and now works without interruptions, amazing a $59.00 dollar radio works better than a $2300,00 Mercedes radio.
Now, my car is out of warranty, and I wanted to purchase a SERVICE MANUAL, come to find out, now, the manuals are a subscription from Mercedes and cost up to $3100.00 dollars per year to subscribe.
NOt only we paid $91,000.00 for the car new, now Mercedes is trying to squeeze more from their customers.
SHAME ON MERCEDES BENZ.
I have had Mercedes for the past 40 years, never had a problem till now.
Thinking of doing some research on other brands and get rid of out two Mercedes.
However, the car have been running mechanically good so far.









