RE: Mercedes-Benz SLK350 manual | Spotted
RE: Mercedes-Benz SLK350 manual | Spotted
Wednesday 11th September 2024

Mercedes-Benz SLK350 manual | Spotted

Want a cheap six-cylinder, manual sports car that isn't a Boxster or a Z4? You're in luck...


What do you want from a sports car? Given this is PH, a few desirable features can hopefully be assumed: a powerful engine (ideally naturally aspirated), rear-wheel drive and a manual gearbox would make for an auspicious start. There’s a reason why cars thus configured - from Caterham to Corvette and GR86 to GT3 - are so popular around here. Simple pleasures, see. 

It’s also why cars like the Porsche Boxster and BMW Z4 so often come up in discussion. For less than £10,000 you’re going to get a great little two-seat roadster with a lovely six-cylinder engine and the unrepeatable enjoyment of a six-speed manual. They’ll take a little bit to keep in fine fettle now given their age, but both remain very tempting purchases. It’s that manual availability that has tended to keep them more recommendable than the contemporary Mercedes SLK; the R171 generation’s seven-speed auto was quite a big deal in the 2000s, but less desirable now. A bit like the old Porsche Tiptronic, in fact. The solution? Well, it’s obvious - a manual, V6 SLK, of course. 

Yes, it was a real thing and, yes, this is one of them, a 272hp, 3.5-litre Mercedes SLK with a six-speed manual. Interesting, right? Though inevitably not all that popular with buyers, the 350 manual was well received in media drives: ‘The engine has a willing personality that is perfectly suited to a manual transmission - you'll definitely not regret choosing it over the automatic’ reckoned Car & Driver, adding that the precise and rewarding shift felt ‘like the love child of a Honda S2000 and BMW M3’, which doesn’t sound bad at all. Autocar suggested that the SLK’s six-speed was, at long last, a ‘Mercedes manual gearbox that encourages the driver to shift gears.’ Paired with a smooth, powerful 3.5, the verdict was that the manual ‘is now good enough to offer an alternative to the terrific new seven-speed auto’. Bet you weren’t expecting that. 

Now, obviously, these verdicts are the best part of 20 years old, and nobody was calling this a Mercedes MX-5. But plenty of less-than-stellar manuals remain fawned over, and the prospect of an SLK with a big engine and a clutch pedal is certainly intriguing. Boxsters, Z4s and the like are good, sure, though it’s nice to be a bit different sometimes. Even better if different is actually not half bad. 

Predictably, there aren’t many SLKs out there with six naturally aspirated cylinders and six manual gears. There are a few, however, and this one looks an absolute corker: Thulite Red is a welcome break from black, blue, or silver, and pairs fantastically with Sahara Beige leather. It’s covered 71,000 miles with two owners since 2008 (the most recent since 2012), and is said to benefit from a full service history. From the pics, it appears extremely well cared for; certainly there are many worse looking ‘171s out there. 

Gets better, too, as this example has been retrofitted with a smartphone-compatible head unit, the front discs and pads are new, plus a fresh MOT will be supplied (the current test runs to November without an advisory). Lots of boxes ticked there. Now imagine what a Boxster or Z4 like this would cost - certainly more than the £6,995 being asked here. That barely buys a 350Z Roadster these days. For an SLK this smart, that doesn’t seem very much at all. Just get used to telling people that a manual really did exist…


SPECIFICATION | MERCEDES SLK 350

Engine: 3,498cc, V6
Transmission: 6-speed manual, rear-wheel drive
Power (hp): 272@6,000rpm
Torque (lb ft): 258@2,400-5,000rpm
MPG: 26.7
CO2: 255g/km
Year registered: 2008
Recorded mileage: 71,000
Price new: £35,792 (2007)
Yours for: £6,995

See the original advert here

Author
Discussion

cerb4.5lee

Original Poster:

44,553 posts

209 months

Wednesday 11th September 2024
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This is definitely right up my street for sure, and weirdly I didn't realise that they were offered with a manual either. Very nice.

BeastieBoy73

813 posts

141 months

Wednesday 11th September 2024
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My wife had a manual one of these and changing gear was like mixing porridge. I was never convinced that the gearbox Mercedes used was intended to be put in a car.

Mad Maximus

989 posts

32 months

Wednesday 11th September 2024
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Was looking at these or a 3.0 z4. Went for an older cheaper 3.0 z4 in the end but that big engine and manual in a small merc was tempting. They do look a bit soft around the edges though.

Triumph Man

9,586 posts

197 months

Wednesday 11th September 2024
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My father in law has one of these - I didn’t realise they existed until that point either!

el romeral

2,155 posts

166 months

Wednesday 11th September 2024
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That seems like great value with the 3,5 liter engine. Bit of a Q car as it looks very much like the lesser 2 liter model.

Amanitin

542 posts

166 months

Wednesday 11th September 2024
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is this the engine with some serious issues around the balancer shaft?
90 degree V6 because derived from V8?

Luke.

11,995 posts

279 months

Wednesday 11th September 2024
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Got the facelift with 305bhp albeit auto. Brilliant little cars and really underrated. For what they're worth now and what they do, just not worth selling.

Earthdweller

19,320 posts

155 months

Wednesday 11th September 2024
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Looked at these and the previous gen when I was looking for a roadster and subsequently buying a Z4 3.0Si

I found them boring, just worthy but dull if im honest

I didnt want an auto and the manual was as rare as hens teeth and having had a manual C Class i didnt reckon it would be much cop

There was also the fact that the RFL would be in the highest band

I dont regret buying a Zed over one of these

trevalvole

2,062 posts

62 months

Wednesday 11th September 2024
quotequote all
Amanitin said:
is this the engine with some serious issues around the balancer shaft?
Yes, but I understand Merc had fixed it prior to 2008 (you'd need to check the engine numbers).

Amanitin said:
90 degree V6 because derived from V8?
Yes, though it is quite common e.g. ALFA and Jaguar.

dunnoreally

1,356 posts

137 months

Wednesday 11th September 2024
quotequote all
If I was looking for something in this bracket, the first thing I'd try would be a Nissan Z, I think.

Also, if you want a *really* cheap 2-seat manual v6 convertible, there's always the Crossfire. Yes they're cheap for a reason, but I can still see why someone would.

WPA

14,669 posts

143 months

Wednesday 11th September 2024
quotequote all
Knowing Mercedes and manuals I doubt it is the best gearbox choice

cerb4.5lee

Original Poster:

44,553 posts

209 months

Wednesday 11th September 2024
quotequote all
dunnoreally said:
If I was looking for something in this bracket, the first thing I'd try would be a Nissan Z, I think.
That was the direction I went in, but it is nice that you have the option of this rather than the more predictable Nissan Z or BMW Z4 route I reckon.

However, I do wonder how good the manual is in this though as others have said, especially when you consider how much Mercedes usually focus on autos I think.

trevalvole

2,062 posts

62 months

Wednesday 11th September 2024
quotequote all
dunnoreally said:
Also, if you want a *really* cheap 2-seat manual v6 convertible, there's always the Crossfire. Yes they're cheap for a reason, but I can still see why someone would.
My impression is that the Crossfire is even more prone to rust, has slow recirculating ball steering and you'd struggle to get even basic parts from Stellantis.

B'stard Child

31,077 posts

275 months

Wednesday 11th September 2024
quotequote all
WPA said:
Knowing Mercedes and manuals I doubt it is the best gearbox choice
I had manuals in the earlier R170 (230K 6 speed) and the R171 (200K 6 Speed) I found them to be very good gearboxes - not quite in the rifle bolt purity of an MX5 or a gated Ferrari shift but nice to use with a good range of ratios

I couldn't find a V6 manual when I went looking for a replacement for the 200K (it was just too slow) so decided I I was going to have to get an auto it might as well be the SLK55 AMG (That's a bit of man maths for you)

GeniusOfLove

5,763 posts

41 months

Wednesday 11th September 2024
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I had a 2008 SLK350 manual, there was a facelift later in the year (this isn't one) and the later engine is much improved with 312BHP at 6500RPM and all the troublesome bits removed. It was proper old school NASP tuning too:

Wikipedia said:
This was achieved by raising the rev-limit to 7200 rpm, increasing the compression ratio using enhanced, weight-optimized pistons with a curved surface, reinforcements in the area of the piston pins, deeper pockets for the valve seats, single-stage intake manifold, lightweight valves with sodium cooling, conical valve springs, tri-oval chain sprocket, and a new cylinder head.
The engine was absolutely superb, it flew up to the redline and made a wicked noise doing it, but the car would need some fairly expensive mods (LSD, suspension, thicker ARBs) to be more sportscar than fat man mini GT.

I've also never seen any modern car rust as consistently as the R171 and the tips of the front wings!

Have to say though, I'd feel a complete and total plum sitting in a pre facelift SLK350 in 2024 having spent £7k on it, even if it was the better version (which again, this isn't).

Edited by GeniusOfLove on Wednesday 11th September 09:56

ralphrj

4,084 posts

220 months

Wednesday 11th September 2024
quotequote all
WPA said:
Knowing Mercedes and manuals I doubt it is the best gearbox choice
I can't comment on the quality of the shift as I never drove one but it is a rarity in recent MB history as being RWD with a manual and a handbrake rather than a footbrake with always made things a bit tricky on a hill.


J4CKO

46,824 posts

229 months

Wednesday 11th September 2024
quotequote all
Watch out for subframe rust on these, freind of mine has a 280 I think it is, his got condemned for terminal subframe rot, but, Mercedes did the right thing and fitted a brand new one FOC, not that long about either, maybe a year or two back.

But, cant guarantee that will be the case for every SLK.

Just get a 350Z if you want some fun though, cant see seven grands worth in this, five tops.

thehardman07

273 posts

210 months

Wednesday 11th September 2024
quotequote all
I have one, albeit an auto. Did want a manual but reviews of it were not good so opted for the auto instead. For what I paid for it it really does offer a lot, looks and sounds great (thanks mainly to the factory fitted AMG goodies and aftermarket exhaust), has enough power with 305bhp to make things interesting and the attention it gets for the outlay is outrageous.

Had it 2 years now and am starting to get itchy feet, but I am struggling to think of anything which will offer the same or more without having to spend twice as much.






Luke.

11,995 posts

279 months

Wednesday 11th September 2024
quotequote all
J4CKO said:
Watch out for subframe rust on these, freind of mine has a 280 I think it is, his got condemned for terminal subframe rot, but, Mercedes did the right thing and fitted a brand new one FOC, not that long about either, maybe a year or two back.

But, cant guarantee that will be the case for every SLK.

Just get a 350Z if you want some fun though, cant see seven grands worth in this, five tops.
Any rusty subframes should all be replaced FOC.

GeniusOfLove

5,763 posts

41 months

Wednesday 11th September 2024
quotequote all
thehardman07 said:
I have one, albeit an auto. Did want a manual but reviews of it were not good so opted for the auto instead. For what I paid for it it really does offer a lot, looks and sounds great (thanks mainly to the factory fitted AMG goodies and aftermarket exhaust), has enough power with 305bhp to make things interesting and the attention it gets for the outlay is outrageous.

Had it 2 years now and am starting to get itchy feet, but I am struggling to think of anything which will offer the same or more without having to spend twice as much.





Facelift car with the extra power? That's quite rare as a 350, the facelift came out just as the arse dropped out of the economy so sales of 3.5 litre roadsters tanked. Looks great on those wheels.