The user manual does not say anything about needing to warm up the engine when it's cold in the morning. In my BMW 520 user manual, it says very clearly that you don't need to warm up the engine at all. In the ML user manual it only says that I should not use the reserves of the engine (kick down) until the engine reaches to normal operating temperatures.
Do you warm up the engine before driving? How cold does it need to be to need to warm up the engine before driving?
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2003 ML500 (Brilliant Silver, Charcoal Leather)
M2: Leather upholstery, additional wood interior trim, trip computer, automatic day/night driver-side and rear-view mirrors, power-folding outside mirrors w/memory, rain-sensing wipers, power front seats w/memory, locking under-passenger-seat compartment and rear privacy glass.
M4: Spare Tire Carrier
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COMAND 2.0 with CD Changer
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I don't put it in gear until the RPMs drop (you'll notice that the truck idles at a slightly higher speed for a few seconds after you turn it on - especially if it's cold out). After that, I baby it until I reach operating temperature.
MB also builds in a lot of safeguards against abuse. Most of the hesitation and rough shifting that people report are the result of these safeguards. You'll probably notice that the truck shifts a little funny until it's around 80C, it should try to stay in lower gears longer to increase the engine temp as fast as possible.
Tack! (thought I'd try out the little Swedish I know on you [:)])
I don't put it in gear until the RPMs drop (you'll notice that the truck idles at a slightly higher speed for a few seconds after you turn it on - especially if it's cold out). After that, I baby it until I reach operating temperature.
MB also builds in a lot of safeguards against abuse. Most of the hesitation and rough shifting that people report are the result of these safeguards. You'll probably notice that the truck shifts a little funny until it's around 80C, it should try to stay in lower gears longer to increase the engine temp as fast as possible.
Tack! (thought I'd try out the little Swedish I know on you [:)])
Didn't Andy mentioned that warming the engine too long can cause temp diff with tranny causing....
I wait until the fast idle has smoothed out, then into gear and away I go.
I use the throttle very little until the ML warms up. As soon as I hit 80C, the hesistation disappears and the throttle response is instant.
Took a bit longer to warm up today as it is currently -21C, -32C with the wind.
In the service manual is specifically says not to warm up the vehicle before driving it. When I get back later this evening I will look it up and post the page and the exact booklet.
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Andy
2006 ML350
723 - Pewter, 104 - Macadamia Interior, H04 - Brown Birds Eye Maple Wood, 167 Standard Non-Sport Pkg, 317 Comfort Pkg, 318 - Trim Package, 319 - Lighting Package, 320 - Entertainment Pkg, 324 - Sunroof Pkg, 580 - Std. Climate Control, 873 - Heated Front Seats, 890 - Power Liftgate, Navigation System, iPod interface kit
Modifications:
Added: Chrome Door handle cups, MB Twin Spoke 5-Spoke 18" wheels and tires
There's no need to warm up the engine after a cold night. As long as you let the fast
idle get down, you can put it in gear and go, taking it easy as it gets to operating temps. Even if you don't take it easy, the tranny will not upshift until the electronics detect that it's the proper temperature to upshift.
Now a small lesson in lubrication: letting it idle to warm up causes unecessary engine wear - oil is not moving around at pressure to lubticate everything. It also doesn't allow the cabin to warm up as fast as desired - no air flow to distribute the warm air. So, either way, there's really no advantage to letting the engine run just to take it to operating temps.
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RE: Do you warm up the engine before driving?
How long usually you have to warm up the vehicle 5minutes 10minutes? coz i usually take 5minutes or less.. why is it bad to warm up the vehicle??? what kind of problems might occure if u warm up the vehicle often.
Usually less than a minute (possibly longer if it's really cold). If you let the engine warm up, the transmission isn't running so things warm up at different rates. It's best to let the entire drivetrain warm up at the same time. You could end up with transmission issues or oil pump issues because the oil needs to manually circulate instead of using the engine's momentum.
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