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Old 05-22-2002, 10:13 PM
vwbuge's Avatar
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Join Date: Sep 2001
Location: Johnstown, Pennsylvania
Posts: 2,106
speakers...'85 300sd

What size speakers fit in the 300sd? (stock) 4"X6"? I was thinking of replacing with 6"X9" in rear, if they will fit.

'85 300SD (formerly california emissions)
'02 Jeep Grand Cherokee Limited
'04 VW Passat W8 (6spd manual) SOLD!!
'68/'69 Empi Imp body on '65 Beetle pan
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'72 Triumph T100R
'70 Yamaha R5 Rat Bike
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Old 05-22-2002, 11:04 PM
Kyle Blackmore's Avatar
Mostly Harmless
Join Date: Sep 2001
Location: almost beyond Hope...B.C.
Posts: 950
Maybe try posting this on the car audio forum,or try a search.Good luck....
1985 380SE- 160,000km 'Blistu' - Sold
1988 300CE- Eva,my garage mistress
2007 R350 4matic- The Black Pearl
2011 Ford Ranger-Work truck
1974 25' Trojan Sea Raider- 'Grannyknot'
2002 215 cm Atomic DH skis- Canadian SDH record holder, 175.5km/h- Vars 2010
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Old 05-23-2002, 03:12 PM
Posts: n/a
on the 123's they are only 5 1/4 round jobs. And those barely fit. Don't know about yours. Remover the grills and measure them.
You can add a subwoofer under seat (small ones are out there) to pick up bass. Some people have removed the med kit and used that hole for a subwoofer.

Speaker system in these old mercs are very poor. Any modern speaker is an improvement. Look at infinity on ZEB audio website.

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Old 05-23-2002, 11:11 PM
ck42's Avatar
Registered User
Join Date: Nov 2001
Location: Holly Springs, GA
Posts: 866

The speakers are an odd-ball sized 4x6" oval....really something like 3.75x5.5" or something like that.

I replaced mine very recently with Boston Acoustic 746 plate speakers. They are a separate 4" round with a separate tweeter plate.

The fronts needed to be snipped on the corners to fit but finally got there ok.....grills fit back on fine.

The rears just drop right in with no mods BUT the grills won't snap back down.....the speakers must sit up about 1/8" higher than the OEMs.

Otherwise, the BA sound great!
1985 300SD - 'Grace' (198K mi.)
2010 Honda Fit Sport
2013 Honda Accord Sport
1996 Lexus LS400 (Retired)
1995 Ford Contour SE (Retired)
1976 Porsche 914 (Sold)
1972 Datsun 240Z (RIP)
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Old 05-24-2002, 01:36 AM
Emu Rancher
Join Date: Mar 2002
Location: Washington, DC
Posts: 664
I have an 83 300sd and I've put a subwoofer in it and replaced the rear speakers. I was able to replace the rears with 4x6s rather easily. the system sounds great.

W126 1983 300SD 286,000 miles and ticking
Baby blue exterior Grey MB tex
Recent work:
Replaced air cleaner mounting brackets and heat shields
Replaced alternator, fan and power steering belts
Replaced positive battery terminal
Replaced negative battery terminal and cord
New Duralast Battery

My car needs work.
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