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'86 W123 200, OM617 non-turbo, bastard 5-speed; '95 W202 C250 Diesel, OM605 non-turbo, 5-spd man
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4,271 Posts
Discussion Starter #1
Greetings, all

During my journey of discovery today, I discovered that my car has a tandem power steering pump. I thought the ABS pump looks different to the unit in my W202 (too many hydraulic hard lines?), but a part number search reveals that my car has conventional ABS and not ASD. So what else could require a tandem pump, and what do I look for to identify the system?

Thank you
 

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Outstanding Contributor
350SDL, '17 GLS450, "Grandpa's Roadster" Project Car
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3,245 Posts
Which car? Many Diesels have a vacuum pump in addition to the power steering pump.
 

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Premium Member
1989 560 SEC - V-8 Kompressor - 95 E320 Estate
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2,001 Posts
80's MB's with SLS systems (mostly wagons) had the tandem pump to support SLS and pwr steering. S class V-8's had the SLS pump mounted on the front of the engine block. Has nothing to do with your brake system.
 

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Registered
'86 W123 200, OM617 non-turbo, bastard 5-speed; '95 W202 C250 Diesel, OM605 non-turbo, 5-spd man
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4,271 Posts
Discussion Starter #4
Which car? Many Diesels have a vacuum pump in addition to the power steering pump.
80's MB's with SLS systems (mostly wagons) had the tandem pump to support SLS and pwr steering. S class V-8's had the SLS pump mounted on the front of the engine block. Has nothing to do with your brake system.
My W126 is a 300SE, as indicated in my signature - not a diesel, and not a V8. In fact, it is very much an entry-spec Euro model. Yet the power steering pump itself reads "Tandem lenkelpumpe".

What equipment would identify the SLS system, if so equipped? Is it possible my car could have ASR, since it doesn't seem to have ASC?
 

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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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3,957 Posts
Tandem pump typically are for the rear suspension. Check underneath the car, you likely can spot the SLS level valve on the rear sway bar and two hydraulic lines going to the rear struts.
 

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Moderator
1991 500SEC 55K mi. 1987 560SEC Now 153K mi. 2020
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4,513 Posts
Hey there PlaneC.

Perhaps a photo or two of your system components would help clear the question up.....

For clarity here, the ASR unit itself contains both a brake fluid reservoir and pump should the ASR function ever be called upon.
The brakes are independent of the self-leveling system components.

MBL
 

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1985 300 TD 1981 300 SD
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408 Posts
That nice big plastic hydraulic fluid reservoir at the left front corner of your engine bay feeds the sls pump, you show it in the pics in the ( What did you do today) thread.:D
 

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'86 W123 200, OM617 non-turbo, bastard 5-speed; '95 W202 C250 Diesel, OM605 non-turbo, 5-spd man
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4,271 Posts
Discussion Starter #8
Well, I can say that this car has hydraulic accumulators and a deflection sensor on the rear anti-roll bar. I cannot say for certain that the rear shocks are hydraulic, because it is difficult to see the hydraulic connection.

So, is there a way to test whether the SLS is working? I couldn't find it in the FSM.
 

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04 odyssey (265k) 1995 E320 wagon (295k)
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Find some heavy people to sit on bumper, car will sag a little. Then Start car it should rise back to level. Else you have to put on jack stands disconnect turnbuckle on valve and manually raise and lower rear.
 
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