C63 Engine
Some causes are a lean fuel mixture, too hot of a spark plug, excessive timing and carbon deposits.
Ultimately, it can lead to engine damage and failure.
What kind of gas are you using? Because i know guys that have 63's and 65's but they put in 87 octane gas in a $150,000+ car. Ping occurs under heavy workload and when the temperature in the fuel air mixture reaches extreme temperatures. Using low grade gasoline on a high performance car causes Carbon build up in the combustion chamber. Use Chevron 91 octane every single time you fill up. Chevron uses techron which cleans up carbon buildup in your engine. You might have to change your ignition timing as well.
Its funny and ironic because, people buy these high end, expensive cars and they don't even want spend the little extra money to fill it with 91 octane.
Last edited by _AMG_; Jun 7, 2010 at 02:12 PM.
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What kind of gas are you using? Because i know guys that have 63's and 65's but they put in 87 octane gas in a $150,000+ car. Ping occurs under heavy workload and when the temperature in the fuel air mixture reaches extreme temperatures. Using low grade gasoline on a high performance car causes Carbon build up in the combustion chamber. Use Chevron 91 octane every single time you fill up. Chevron uses techron which cleans up carbon buildup in your engine. You might have to change your ignition timing as well.
Its funny and ironic because, people buy these high end, expensive cars and they don't even want spend the little extra money to fill it with 91 octane.

Mine is a bit noisy when the car is warming up or idling...
Check your oil levels.
The car has a knock sensor, it will detect knocking (detention) and retard the timing. So I doubt its pinging.
Last edited by RuuDV; Jun 7, 2010 at 09:34 PM.
I used 94 octane once when in the remote country and there was no 98 available and all that happened was my fuel consumption was worse but still no pinging.
I think there is something wrong with your ML63.
Last edited by _AMG_; Jun 8, 2010 at 12:59 AM.
Last edited by _AMG_; Jun 8, 2010 at 12:57 AM.
On a side note, i commute between china and hk, and the best fuel quality up in china that i can find so far is 98. But from using those fuel in my other cars, it causes a lot of problems with the cars, fuel pumps being plugged and a lot of junk in the fuel. Wondering if anyone know what grade 98 fuel actually is compared to the states.
There is actually a shell gas station in Pasadena, CA that sells 101 octane race fuel for $8 per gallon. Ive always wanted t try it out. Half tank 101 octane and the rest with 91 octane.
I would go to the dealer and ask for a test drive with a new ML63 so you can try to simulate the pinging. If the new ML63 doesn't ping, then take your own ML63 for a test drive with the same dealer so he/she can hear the pinging and then realize that you have an issue and start to take you more seriously. Also take the service manager or a technician with you on the test drive if possible too!
I would also ask where the dealer gets his fuel for the ML63 demo (if it didn't ping) so you can try the same fuel station.
Don't you have Shell V-power in Australia? Try that too.
Last edited by GMW; Jun 8, 2010 at 10:01 AM.



