Top top-down speed - Mercedes Benz SLK Forum

RoadTrip Field Reports RoadTrip Field Reports as filed by roadtrippers who are ON-THE-ROAD RIGHT NOW and after returning from "out there". Misc. tips and news postings of interest to future planning.

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#1 Old 02-27-2012
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Top top-down speed

A buddy and I had a chance to take the SLK 350 out for a good run from Tucson to Palm Springs a few days ago. The car has hardly been driven hard in its life, and I have been noticing a clattering/rattling noise on acceleration around town. My hope was that some new spark plugs, a bottle of Techron, and a fast 800-mile roadtrip would clear up any deposits in the engine.

We took I-8 across southern Arizona to the Imperial Valley in California, which is a lightly traveled and wide-open road most of the time. Somewhere along the way, with no traffic in sight, the pedal, uh, stuck to the floor and we watched in amazement as the SLK quickly and smoothly accelerated through 100 ... 110 ... 120 ... 130 ... 140 ... all the while displaying absolutely perfect manners without the slightest shaking or handling quirks. It felt as safe and comfortable at 140 MPH as it did at 75. (The car wanted to go faster but we had to unglue the pedal from the floor at that point, since we were coming up on traffic ahead very quickly.)

The SLK is really a fine highway cruiser. With the sun setting and outside temps running about 73 degrees F, we were comfortable and able to carry on a conversation with the top down even at speeds up to 100 MPH. Six hours of drive time later, neither of us felt fatigued or sore, and we were both kind of sorry that we had to get out of the car.

On the way back, via I-10 between Quartzsite and Phoenix, I let my leadfooted buddy drive. The end result was very pleasing:

1. We got home in record time.
2. The acceleration noise is gone.

I already want to go on another roadtrip.
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#2 Old 02-27-2012
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Oh how I miss the Autobahns.....

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#3 Old 02-28-2012
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^^ What he said! I love the feeling of any Mercedes at speed, and it really makes you appreciate the design aspects that will let the car cruise at 120+ quite happily.



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#4 Old 02-28-2012
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I agree, Mercs are very good at speed. I've not driven an SLK on the autobahn, only in the UK so of course I've never exceeded 70 mph in one on the road
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#5 Old 02-28-2012
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so true... I only had the chance to get to about 130 and I was surprised how stable she was at that speed. gotta try to beat that without going to jail!
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#6 Old 03-10-2012
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Lets see here... 70 + 70..wait no..nowhere in the states with that speed limit..er.. So yes we will stick with 70! That's as fast as I go..never mind the math I started.
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#7 Old 03-10-2012
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Last year when I first got my SLK I had the opportunity to really open the taps. Sadly the piece of tarmac was only 1.9 miles long.

With the top down I hit 130mph and with the top up I hit 140mph. Wonderful! Just a shame I had to stamp on the brakes, I would have loved to take it to the limit.

I've just completed a 1222 miles round trip to visit relations in Scotland. 450 miles each way, and some general running about. I averaged 30.2mp(UK)g. Pretty good for a 3.5l V6, considering on the way home I wasn't exactly hanging about, and purely by chance I found a wonderful driving road, wide, smooth, sweeping bends, long straights - perfect for playing with the performance.

My only concern is I may have a speeding ticket on the way to me. I was overtaking a slow truck; dropped it into 4th gear & floored it. Shot past the truck and there was a speed camera. My terminal speed was a bit over the limit! Oh well. Such is life!
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#8 Old 03-10-2012
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My only concern is I may have a speeding ticket on the way to me. I was overtaking a slow truck; dropped it into 4th gear & floored it. Shot past the truck and there was a speed camera. My terminal speed was a bit over the limit! Oh well. Such is life!
We were coming back from Scotland last year and the same thing happened to us. Had been sat behind a truck for ages, first bit of straight without double-white lines, so booted it around the truck and..... past a speed camera!! Fortunately we didn't get a ticket.
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#9 Old 03-10-2012
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We were coming back from Scotland last year and the same thing happened to us. Had been sat behind a truck for ages, first bit of straight without double-white lines, so booted it around the truck and..... past a speed camera!! Fortunately we didn't get a ticket.
I've been up & down the A9 more than enough times for the limit to be embedded in my thick skull! I usually set the cruise to bang on the limit as I have a heavy right foot and I've fallen foul of the scamera vans a few times before. Still, the A9 is not as bad as the A74(M).

The A86 past Loch Laggan is driving heaven!
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#10 Old 03-10-2012
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300 km/h in my SLK55 very easily.

06 SLK55 AMG (Kleemann K2)
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#11 Old 03-11-2012
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300 km/h in my SLK55 very easily.
I’ll never admit to it


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#12 Old 03-11-2012
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does 85 in heavy rain top down count


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#13 Old 03-11-2012
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I managed 125 a mile before I left the M1 last Tuesday. Just happened to be a stretch of almost empty road. I am normally good about speed limits but the temptation was too great Doesnt take many yards to go from 80 to 125 does it
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#14 Old 03-11-2012
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I managed 125 a mile before I left the M1 last Tuesday. Just happened to be a stretch of almost empty road. I am normally good about speed limits but the temptation was too great Doesnt take many yards to go from 80 to 125 does it
Only 125?? You can't have been trying hard enough!
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#15 Old 03-11-2012
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Only 125?? You can't have been trying hard enough!

Only had a mile to the slip road, and that goes by pretty quickly. LOL I didnt want to be up the ramp at that speed. Plus I was on the lookout for Police cars marked and unmarked coming up behind me.
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#16 Old 03-11-2012
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I managed 125 a mile before I left the M1 last Tuesday. Just happened to be a stretch of almost empty road. I am normally good about speed limits but the temptation was too great Doesnt take many yards to go from 80 to 125 does it
Do you class the last section of your local motorway (i.e. that section between the penultimate junction and the one you turn off to get home) as 'fair game', and often take your car up to 70mph () on it? - for some reason I do, and it's the only place I will drive well over 60mph (almost up to 70 ).






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#17 Old 03-11-2012
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The safest bit of motorway to put a bit of speed on is the M69 towards Leicester after you cross over the A5. The Warwickshire unmarked Golf. BMW and Volvos turn back there as its the county boundary and Leicestershire police seem to ignore their bit of the 69
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#18 Old 03-11-2012
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