Short summary of below story: How to replace rear upper and lower control arms for an 05 CLK 500 Coupe (W209)?

I have just recently replace front arms and then went in for an alignment. The shop said they were only able to align the front wheels but not rear (something about MB not releasing factory alignment specs for rear wheels). My rear wheels had slight camber, and shop said it was because my rear arm bushings were worn and recommended a replacement. I went ahead and purchased a 6 piece kit, picture is below. When I called the shop and asked how much labor would be, he first quoted me $300 and $1000 for upper and lower arms (can't remember which quote was for which). He couldn't figure out why the quote was so high (computer gave him automated quote based on year make model). He just called me back and said he looked into it, and it'll be about $430 total for both wheels. I asked why suddenly much cheaper and he s aid originally he thought he had to lower the subframe, but now he just has to remove the drivetrain and something else.. Does this make sense? I tried looking everywhere online for instructions on replacing rear arms, and can only find for the front. Any tips or instructions, does the subframe need to be lowered?

Thanks in advance.
Purchased kit:

…. Not just about MB not releasing rear factory alignment specs!

FACTS ARE THERE IS SIMPLY NO REAR (OR FRONT) ADJUSTMENT TO MAKE.... ONLY TOE “DIRECTIONAL” ADJUSTMENT. NO ESSENTIAL CAMBER ALLOWING TO “CHANGE TIRE CONTACT ANGLES” !

SAME WITH FRONT ONLY TOE. Some models (not W209) for front you can fit a inaccurate (one offset position) Camber and Caster bolts, but they only offer a miniscule .3 of one degree adjustment.

Lack of Camber and Caster is new car industry's best kept secret. All to do with cost cutting and ever increasing speed of auto assembly lines.

KMAC has the experience of resolving such OEM shortcomings since 1964.



FOR THE W209 WE THEREFORE MANUFACTURE:
1. Front Replacement Bushings (the 4 highest wearing)
That also provide “ precise single wrench” adjustment accurately (under load) of both Camber and Caster. 5 times the adjustment range of one offset position bolts.

#503516K $480 (Both Sides)
#503516-1G $295 (Both Sides) Budget priced - Same as above but Camber adjustable only (less then the cost of one high performance tire).



2. Rear Camber (and extra Toe adjustment to compensate).
Replacing the lower arm inner bushings. Like front the unique patented design allows precise single wrench adjustment to resolve costly, premature edge tire wear.

#501926 J $380 (Both Sides)
#501526J $380 (Both Sides) W209 Black Series



3. Also manufacture rear upper “turnbuckle adjustable” Camber arms (also include extra Toe adjustment to compensate along with concise instruction sheet).
Upper arm adjustment reduces clearance top of tire to outer fender when wanting to adjust to resolve premature inner edge tire wear. Where “Lower arm adjustment” retains the tire to fender clearance (and is more accessible).

#501526-1M $595 (Both Sides)



4. UPRATED BUSHINGS FOR THE '6' REAR MULTI LINK ARMS.
Less twitch / flex, loss of traction. Especially when applying power to lane change / overtake.

#501528K $480 (Both Sides)
#501528-1K $480 (Both Sides) AMG & Black Series


DHL Delivery $40 one kit ($20 each extra)

1888 844 9099 (24/7) Worlds Largest Range Front & Rear Adjuster Kits – Audi to Volvo

For the rear suspension, one of the arms (on each side) has a bolt that is very difficult to remove without having to lower the subframe or some other invasive method to get to. When I replace my rear suspension arms, that was the only arm that I did not replace. To me, it seemed that the arm was in good condition so it was no big deal not to replace them (my kit included the arms, but I did not use them).