How reliable are the engines in a 2007 Mercedes-Benz R320 CDI?
10-31-2010, 09:16 PM
#1
How reliable are the engines in a 2007 Mercedes-Benz R320 CDI?
There's one for sale nearby, and I'm curious as to how dependable these are. I'm not that familiar with the model.
Thanks!
Thanks!
11-02-2010, 08:04 PM
#3
Senior Member
Do you need big car or not ..? Same engine is used on ML model and I am driving it now ...
Very important: it's very difficult to sell this car due to very limited market
11-03-2010, 01:33 PM
#4
MBWorld Fanatic!
As is every engine in every car these days.
They are not "industrial" engines designed for repeated rebuilding.
I'd suspect their life to be equal to any gasoline Mercedes engine.
It's good to understand that diesel engines by their very nature are NOT longer lasting than gasoline engines. Engines that are long lasting are designed to be long lasting, and gasoline engines can be designed that way, too. It's been a while since many have been, but one can reference GMC V6 and various IHC engines of the 1950-60s for examples. Diesels have replaced gasoline engines in trucking mainly because of their fuel economy and the fact the notion of high-compression, i.e. efficient, gasoline engines is foreign to most.
There's not a lot of incentive to design ANY car engine for ultra longevity these days, as things like weight, fuel economy, cost, etc. take precedence. The OM642 V6 is indeed aluminum.
The OM642 appears to be fairly dependable, as there is little talk of much component replacement yet, in fact moreso than the OM648 (inline 6) which have required injectors and glowplugs seemingly early and have suffered from EGR system clogging. Ours got one new ($750) injector while still under warranty.
One can self-congratulate for owning an old dog Mercedes diesel from the 1980s, but it doesn't change the fact the new engines provide supercar-like performance and much better fuel economy at the same time and of course are not gross polluters as is the old iron.
They are not "industrial" engines designed for repeated rebuilding.
I'd suspect their life to be equal to any gasoline Mercedes engine.
It's good to understand that diesel engines by their very nature are NOT longer lasting than gasoline engines. Engines that are long lasting are designed to be long lasting, and gasoline engines can be designed that way, too. It's been a while since many have been, but one can reference GMC V6 and various IHC engines of the 1950-60s for examples. Diesels have replaced gasoline engines in trucking mainly because of their fuel economy and the fact the notion of high-compression, i.e. efficient, gasoline engines is foreign to most.
There's not a lot of incentive to design ANY car engine for ultra longevity these days, as things like weight, fuel economy, cost, etc. take precedence. The OM642 V6 is indeed aluminum.
The OM642 appears to be fairly dependable, as there is little talk of much component replacement yet, in fact moreso than the OM648 (inline 6) which have required injectors and glowplugs seemingly early and have suffered from EGR system clogging. Ours got one new ($750) injector while still under warranty.
One can self-congratulate for owning an old dog Mercedes diesel from the 1980s, but it doesn't change the fact the new engines provide supercar-like performance and much better fuel economy at the same time and of course are not gross polluters as is the old iron.
Last edited by lkchris; 11-03-2010 at 01:36 PM.
11-05-2010, 01:53 PM
#5
Very nice car to drive & own, my brother has one.
Engine is very reliable, at higher mileage sometimes EGR problems.
I have on my V6 CDI now 189.000 km in 2 years, not 1 problem
Engine is very reliable, at higher mileage sometimes EGR problems.
I have on my V6 CDI now 189.000 km in 2 years, not 1 problem
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11-07-2010, 06:05 PM
#7
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11-09-2010, 08:59 PM
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11-09-2010, 09:04 PM
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Yep, thats exactly what you are. Thanks for enlightening me. Kind of sad that I'm already making an ignore list on my first day. I hoped this place would be more mature than others.
11-10-2010, 01:33 AM
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11-10-2010, 08:10 AM
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2004 S55 (SOLD, miss it every day), 2009 GL550
Did you mean oversized station wagon / undersized minivan? Not counting old Detroit iron, I can't think of a single station wagon that isn't smaller than an R, and my wife's minivans have all been much larger than an R.
