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lantisv62500
PostPosted: Tue Oct 03, 2017 12:44 am 
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Location: Auckland, New Zealand
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Part 1.
The Mazda Lantis seats (front) were getting a bit tired (foam dusting the floor) so decided to replace the front seats.
Looked at everything from RX8 seats to Sports/Race seat but in the end settled on the seats from a Merc C Class. (Daughter had one and the seats are excellent)
Purchased a pair of front seats out of a 2005 Merc C Class sedan (leather and electrics.)
Attachment:
Merc seats 007 (233m).jpg
Merc seats 007 (233m).jpg [ 233.54 KiB | Viewed 644 times ]

Size wise the seats are very similar to the Mazda seats but the way they mounted is very different.
Therefore to mount them the first thing I had to do was alter the Mazda seat rails so that they were the same level. (Inner rail is about 28mm higher) I also wanted the seats as low as possible so all mounts on the rails were changed. (3mm plate was used)
On the inner rail all the seat belt anchor plate was also removed.
Attachment:
seat pics 011.JPG
seat pics 011.JPG [ 239.79 KiB | Viewed 644 times ]

Secondly, I had to remove the Merc rails and lifting mechanism. To do this involved removing the seat back, bottom swab (very easy).
Once the bottom frame was sorted out, brackets were fitted at the front (Angle steel) and the rear tube reinfoced for the rails to mount to up.
Attachment:
seat pics 019.JPG
seat pics 019.JPG [ 236.01 KiB | Viewed 644 times ]


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lantisv62500
PostPosted: Wed Oct 18, 2017 2:40 am 
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Location: Auckland, New Zealand
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Have finally fitted the Drivers and passengers seat from a Merc C Class into my Mazda Lantis.
Attachment:
Seats 18 Oct 2017 006 (640x593).jpg
Seats 18 Oct 2017 006 (640x593).jpg [ 72.46 KiB | Viewed 582 times ]

Well worth the time and effort as the seats are nice and comfortable and don't look too out of place in the Lantis.


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brucey76
PostPosted: Wed Oct 18, 2017 6:44 pm 
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Location: Bowburn, Durham
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nice work, they look a little wider but still look like the back will hold you in place, definitely a mod I'd consider :thumbright:


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maZZda
PostPosted: Wed Oct 18, 2017 8:19 pm 
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Does they have heating circuits?If they have you need to connect them and just two switches..
Nice work!


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lantisv62500
PostPosted: Fri Oct 20, 2017 7:21 pm 
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Location: Auckland, New Zealand
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Hi All,

Questions.
Brucey76 - The Merc seats are very close to the same size as the Lantis seats.
There is more space around the Merc seats than the Mazda seats?? but I think the back rest of the Merc seats is deeper and much better designed than the Mazda seat.
Space is a bit tight in the rear when the seats are set up for me (6ft 6 tall) so just about a 2+2 when I"m in it.

maZZda - Yes the seats having the heating cct for the bottom and backrest.
I have not connected them up at this stage as we are coming into Spring and to be honest it doesn't get that cold in Auckland NZ.
Maybe in the future ;)

Thanks
Craig


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lantisv62500
PostPosted: Fri Oct 20, 2017 8:26 pm 
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Location: Auckland, New Zealand
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I was a bit lazy with the amount of info on the install so here's a bit more detail.

SETTING UP MERC SEATS for the Mazda
1/ Merc seats have an excellent rail, lifting and tilting system under them but the rails bolt to a flat floor.
As a conseq unless I was willing to cut out the cross bar that the Mazda seat rails bolt (front) up to all the excellent Merc tech was a waste.
I therefore removed all the Merc rail, lifting and tilting system.
Sadly this meant that the only electrical adjustment left would be the backrest :-(.
The front lift for the bottom swab was changed to a manual wheel. (Motor got in the way of mounting the rails.)

SETTING UP MAZDA for seats.
1/ Mazda Lantis has the inner rails about 27mm higher than the outer rail.
Therefore the first job was to adjust the height of the inner rear seat mount. (All welded up using 3mm plate)
Being tall I decided to make it more difficult by lowering the seat as much as possible.
To get the heights correct I set up a square bar from door jam to door jam as a reference point and measured all from there. (Used passenger side mount for ref)
Attachment:
seat pics 013 (640x220).jpg
seat pics 013 (640x220).jpg [ 53.47 KiB | Viewed 535 times ]

You will note on the modded mount that I have a top plate and bolted through.
Because I had dropped the height I needed the bolt to be dead centre with the rail slider otherwise the rail ran into it.

SETTING UP MAZDA SEAT RAILS
1/ Both rails had their mounting plates removed. This was so I could get them as low as possible and the Merc seats required the rails to be apart further than the Mazda rails therefore bolt up points were further out. (Mazda was a about 365mm between mounting holes and the Merc allowed 405mm.
405mm between mount holes put the Mazda rails inside the Merc Seat frame and allowed the rails to be mounted to the Merc seat rear bar. So I reinforced the rear bar to ensure all good.


Attachments:
seat pics 010 (640x490).jpg
seat pics 010 (640x490).jpg [ 71.2 KiB | Viewed 535 times ]
Seats 18 Oct 2017 004 (640x457).jpg
Seats 18 Oct 2017 004 (640x457).jpg [ 58.15 KiB | Viewed 535 times ]


Last edited by lantisv62500 on Fri Oct 20, 2017 11:44 pm, edited 2 times in total.
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lantisv62500
PostPosted: Fri Oct 20, 2017 8:40 pm 
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Location: Auckland, New Zealand
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PART TWO.
Next bit was the mounting of the rails to the front of the Merc seat frame.
When doing this ensure that the front adjustment bar is the same both sides.
I then made up some mounts out of some 3mm angle steel section and bolted up the front of the frames.
Attachment:
seat pics 009 (640x479).jpg
seat pics 009 (640x479).jpg [ 78.17 KiB | Viewed 534 times ]

Attachment:
seat pics 010 (640x490).jpg
seat pics 010 (640x490).jpg [ 71.2 KiB | Viewed 534 times ]


End result
Attachment:
Seats 18 Oct 2017 003 (800x628).jpg
Seats 18 Oct 2017 003 (800x628).jpg [ 99.19 KiB | Viewed 534 times ]


If you have a very close look at where the rail cable goes you may notice that I lowered the cable mount and the bracket the cable end goes in.This was to give the mount more clearance from the bottom swab.
Once the fit up was completed I stripped the frame/rails/mounts and painted with a Matt black rust paint.


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lantisv62500
PostPosted: Fri Oct 20, 2017 9:10 pm 
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Posts: 89
Location: Auckland, New Zealand
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PART THREE.
Next was reassemble the seat frame/mounts/rails and then start adding the bottom swab and backrest.
Before I could do this I had to mount up the adjusting switch assembly into the plastic side cover. (Merc mount their seat adjusters on the door)
(Didn't have to do this on the passengers seat as it was already mounted there from the factory.)
This involved some careful placement and dremel work. (Got to love the Dremel)
Attachment:
seat pics 014 (640x353).jpg
seat pics 014 (640x353).jpg [ 73.78 KiB | Viewed 532 times ]

Attachment:
Merc seats 009 (640x310).jpg
Merc seats 009 (640x310).jpg [ 54.53 KiB | Viewed 532 times ]

In this photo you can see the wheel mounted for the adjustment of the front of the seat.

The wiring was straight forward. Found some 12v fused and ran the wires and hooked up to the Merc loom I had got with the seats.
The Mazda safety belt clip bolts straight onto the Merc frame and is nicely positioned.
I had to dremel the plastic side covers at the rear to clear the rails and at the front on both the drivers and passengers had to dremel the plastic (under the front lift wheel) to clear the Mazda cross bar.

Attachment:
Seats 18 Oct 2017 005 (800x698).jpg
Seats 18 Oct 2017 005 (800x698).jpg [ 83.93 KiB | Viewed 532 times ]


With DO rails next


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lantisv62500
PostPosted: Fri Oct 20, 2017 9:39 pm 
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Location: Auckland, New Zealand
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RAILS
Plenty of work involved to use the rail from the Mazda.
Looked at using aftermarket but to be honest the Mazda ones with a lot of work were up to the job.
With the rails be very careful and double check.

Please note that when you are cutting old mounts off etc that you DON'T let the sparks from the grinder go into the rail otherwise you may wreck the rail. (Yes wrecked one)

INNER RAILS.
I cut off the safety belt mount and the original mounts.
Then I used some 3mm plate to make up the mounting plates and welded them into place.
Then bend the front mount until it sits correctly on the cross bar.
The rear mount in my case was mounted so that no bending required.
Attachment:
seat pics 017 (640x264).jpg
seat pics 017 (640x264).jpg [ 45.64 KiB | Viewed 532 times ]

From the photo you can see the rail is clean (no belt mount).
I also had to grind the adjuster rail (thing with all the slots) at the front so that it would clear the crossbar.

OUTER RAIL
Much the same work as the inner rail without the issue of the belt mount.
Ensure that you bent the rear mount before welding up to the rail.
The amount of bend height will depend on the height you are going for. (Must be level with the inner rear mount)
Attachment:
seat pics 018 (640x269).jpg
seat pics 018 (640x269).jpg [ 65.65 KiB | Viewed 532 times ]

Close look at the photo and you note that the adjuster cable mount height is lower. (cut and weld)

Thanks
Craig


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pitrack_1
PostPosted: Sat Oct 21, 2017 1:50 pm 
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Location: ACT, Australia
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Craig,

the research, work and effort you have put into this is obvious and very much a credit to you. I hope the result is all you hope for and deserve!

Patrick


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lantisv62500
PostPosted: Wed Oct 25, 2017 8:11 pm 
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Location: Auckland, New Zealand
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Hi Patrick,
Thanks for that and they do look excellent. (Big step up but not out of place)
I could have been a little bit smarter with the selection of seats from the C Class Merc.
I found out later (after I had brought the seats I fitted) that some of the earlier C Classes had the drivers seat with the switch gear on the seat already and I could have saved myself a little bit of time and money.
The trouble was when I saw the two leather full electric seats in great condition I was SOLD.($160nz for the pair)
Otherwise very comfortable - The backrest is ten fold better than the Mazda's and the bottom swab may not have the side support of the Mazda's seat but is a much more comfortable swab if you have to be in the car for any length of time.
If I was tracking the car then I would have fitted something better suited to track but my car is a everyday driver and comfort is important.
The good thing is the leveling of the rails is now done and I can now fit other seats. :-)
Thanks
Craig


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