Either you know what you're doing and have the correct tools...........or you don't.

No real surprise here.

However, if they snap one of the fasteners, the real question is what are they going to do about it in one hour?

Four hours quoted by first-rate MB tech with all the right tools. Maybe is building in breaking fasteners, etc...

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Then he's ripping you off.

I personally watched an experienced tech do both of them in less than one hour. You've got six screws............that's it.

How could it possibly take four hours?

the only way it would take 4 hours, is if he's using hand tools, the bolts are rusted into the frame, and have to be drilled out, and he has to drive to a parts house to get replacement bolts...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Just checked my records and my indie shop charged me 1.5 hours to change 2 mounts. 3 probably would have been 2.5 at most. Sounds like 4 hours is a rip.

They also charged $100 each for the mounts FYI.

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

The place I went to charged me $108 TOTAL for the three mounts, and $132 for labor, so 1.5 hours I guess?

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1983 240D, 272K+ miles (odo broke)

4 hours? Christ I can pull the whole drive train in half that time. Doing engine mounts the very first time took me about 40 minutes sitting in my driveway and I DONT have all the fancy MB tools...

I know this has been covered before, but I'm not having luck with search, and searching on Google has twice led me to one of those "trap" spam pages you can't escape ... so ... is there or is there not a difference between the left and right mount on the 87 300D? I got them from the dealer, who said thet thought there was no difference ... the mounts have identical part #s and look identical outside. However, each has a yellow line and an F written on the bell, one with the F in the middle of the line and one with the line slightly around the bell from the F. Same on the old ones that came out. I noticed as I was doing the second mount that the line/F on the old ones were opposite to how I put the new ones in. Also on the old ones, there is a "34" on the rubber of one and a "35" on the rubber of another. I haven't fastened them back up, so if they're backwards, I'd like to know and swap them. I was fairly certain I'd read they were the same, and the PN suggests that, but the markings had me wondering if I was mistaken.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)

Doh, sorry guys, I meant to post that last question as a whole new thread, not hijack this one again. Apologize. Though at least it's kind of relevant.
FWIW I got the mounts out and in in about an hour and 15 minutes, backwards or not.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)